`{:("ColumnA","ColumnB"),(A."Curbulinear motion",a."motion that repeats itself irregular intervals of time"),(B. "Rectilnear motion",b."Wings of a ceiling fan"),(C."Rotatory motion",c." A stone dropped from a towar"),(D."Body moving with uniform velocity",d."A stone dropped from a towar"),(E."Length of a pendulum",e."point of supendsion to the mid-point of the bob"),(F." Time period of a simple pendulum",f."Square root of the length of the pendulum"),(G."Non-periodic motion",g. "Zero acceleration"):}`

Answer

To solve the matching question between Column A and Column B, we will analyze each item in Column A and find the most appropriate match in Column B.

### Step-by-Step Solution:

1. **Curvilinear Motion (A)**:
- Curvilinear motion refers to motion along a curved path.
- The best match from Column B is **Non-periodic motion (G)**, as it describes motion that does not repeat at regular intervals, which can be associated with a curved path.

2. **Rectilinear Motion (B)**:
- Rectilinear motion is motion along a straight line.
- The best match from Column B is **A stone dropped from a tower (C)**, which falls straight down in a linear path.

3. **Rotatory Motion (C)**:
- Rotatory motion involves movement around a fixed axis.
- The best match from Column B is **Wings of a ceiling fan (B)**, as the fan blades rotate around a central axis.

4. **Body Moving with Uniform Velocity (D)**:
- When an object moves with uniform velocity, it means that its speed and direction remain constant.
- The best match from Column B is **Zero acceleration (G)**, since uniform velocity implies that there is no change in velocity, thus acceleration is zero.

5. **Length of a Pendulum (E)**:
- The length of a pendulum is defined as the distance from the point of suspension to the midpoint of the bob.
- The best match from Column B is **Point of suspension to the mid-point of the bob (E)**.

6. **Time Period of a Simple Pendulum (F)**:
- The time period of a simple pendulum is related to its length and is given by the formula \( T = 2\pi \sqrt{\frac{L}{g}} \).
- The best match from Column B is **Square root of the length of the pendulum (F)**, as the time period is proportional to the square root of the length.

7. **Non-Periodic Motion (G)**:
- Non-periodic motion is motion that does not repeat at regular intervals.
- The best match from Column B is **Motion that repeats itself at irregular intervals of time (A)**.

### Final Matches:
- A - G (Curvilinear motion - Non-periodic motion)
- B - C (Rectilinear motion - A stone dropped from a tower)
- C - B (Rotatory motion - Wings of a ceiling fan)
- D - G (Body moving with uniform velocity - Zero acceleration)
- E - E (Length of a pendulum - Point of suspension to the mid-point of the bob)
- F - F (Time period of a simple pendulum - Square root of the length of the pendulum)
- G - A (Non-periodic motion - Motion that repeats itself at irregular intervals of time)