Match the column
`{:(,"Column I",,"Column II"),((A),"A stationary positive charge",(p),"Exert electrostatic force on other charge directly"),((B), "A stationary negative charge",(q),"Produces electrostatic field directly"),((C ),"A stationary electrically neutrally object",(r ),"Acceleration in the direction of electrostatic field"),((D),"Electrostatic field",(s),"Accelerates opposite to the direction of electrostatic field"),(,,(t ),"Cannot exert force on itself"):}`

Answer

To solve the matching question, we will analyze each item in Column I and find the corresponding item in Column II based on the principles of electrostatics.

### Step-by-Step Solution:

1. **Match A: A stationary positive charge**
- **Option P:** Exert electrostatic force on other charge directly.
- **Analysis:** A positive charge does not exert force directly; it creates an electric field that can exert force on other charges. **(Incorrect)**
- **Option Q:** Produces electrostatic field directly.
- **Analysis:** A positive charge produces an electric field around it. **(Correct)**
- **Option R:** Acceleration in the direction of electrostatic field.
- **Analysis:** A positive charge will accelerate in the direction of the electric field created by itself or another charge. **(Correct)**
- **Option S:** Accelerates opposite to the direction of electrostatic field.
- **Analysis:** This is incorrect for a positive charge. **(Incorrect)**
- **Option T:** Cannot exert force on itself.
- **Analysis:** A charge cannot exert force on itself through its own electric field. **(Correct)**

**Conclusion for A:** Matches with Q, R, T.

2. **Match B: A stationary negative charge**
- **Option P:** Exert electrostatic force on other charge directly.
- **Analysis:** Similar to the positive charge, it creates an electric field that exerts force on other charges. **(Incorrect)**
- **Option Q:** Produces electrostatic field directly.
- **Analysis:** A negative charge also produces an electric field. **(Correct)**
- **Option R:** Acceleration in the direction of electrostatic field.
- **Analysis:** A negative charge will accelerate opposite to the direction of the electric field. **(Incorrect)**
- **Option S:** Accelerates opposite to the direction of electrostatic field.
- **Analysis:** This is correct for a negative charge. **(Correct)**
- **Option T:** Cannot exert force on itself.
- **Analysis:** A negative charge cannot exert force on itself. **(Correct)**

**Conclusion for B:** Matches with Q, S, T.

3. **Match C: A stationary electrically neutral object**
- **Option P:** Exert electrostatic force on other charge directly.
- **Analysis:** A neutral object does not exert force. **(Incorrect)**
- **Option Q:** Produces electrostatic field directly.
- **Analysis:** A neutral object does not produce an electric field. **(Incorrect)**
- **Option R:** Acceleration in the direction of electrostatic field.
- **Analysis:** A neutral object does not experience force, hence no acceleration. **(Incorrect)**
- **Option S:** Accelerates opposite to the direction of electrostatic field.
- **Analysis:** Again, it does not accelerate. **(Incorrect)**
- **Option T:** Cannot exert a force on itself.
- **Analysis:** A neutral object cannot exert a force on itself. **(Correct)**

**Conclusion for C:** Matches with T.

4. **Match D: Electrostatic field**
- **Option P:** Exert electrostatic force on other charge directly.
- **Analysis:** An electric field can exert a force on a charge placed in it. **(Correct)**
- **Option Q:** Produces electrostatic field directly.
- **Analysis:** An electric field does not produce another field; it is a field itself. **(Incorrect)**
- **Option R:** Acceleration in the direction of electrostatic field.
- **Analysis:** An electric field itself does not accelerate; it influences charges. **(Incorrect)**
- **Option S:** Accelerates opposite to the direction of electrostatic field.
- **Analysis:** An electric field does not accelerate. **(Incorrect)**
- **Option T:** Cannot exert a force on itself.
- **Analysis:** An electric field cannot exert force on itself. **(Correct)**

**Conclusion for D:** Matches with P, T.

### Final Matches:
- A → Q, R, T
- B → Q, S, T
- C → T
- D → P, T