`{:(,"Column I",,"Column II"),((A),"An element with +1 stable oxidation state",(p),"lead"),((B),"A neutral oxide",(q),"Dry ice"),((C),"An element with stable +2 oxidation state",(r),"Thallium"),((D),"Solid carbon dioxide",(s),"Carbon monoxides"):}`

Options

A. A-p,B-q,C-r,D-s
B. A-r,B-s,C-p,D-q
C. A-r,B-p,C-q,D-s
D. A-q,B-s,C-r,D-p

Answer

To solve the question, we need to match the statements in Column I with the appropriate elements in Column II based on their properties. Let's analyze each statement step by step.

### Step 1: Identify the element with a +1 stable oxidation state
- **Statement A**: "An element with +1 stable oxidation state"
- The element that fits this description is **Thallium (Tl)**. Thallium is in Group 13 and can exhibit a stable +1 oxidation state due to the inert pair effect.

### Step 2: Identify a neutral oxide
- **Statement B**: "A neutral oxide"
- The neutral oxide that is neither acidic nor basic is **Carbon monoxide (CO)**. It does not react with acids or bases, making it neutral.

### Step 3: Identify an element with a stable +2 oxidation state
- **Statement C**: "An element with stable +2 oxidation state"
- The element that has a stable +2 oxidation state is **Lead (Pb)**. Lead is in Group 14 and typically exhibits +2 oxidation state due to the inert pair effect.

### Step 4: Identify solid carbon dioxide
- **Statement D**: "Solid carbon dioxide"
- The solid form of carbon dioxide is commonly known as **Dry ice**.

### Final Matching
Now, we can summarize the matches:
- A (An element with +1 stable oxidation state) → R (Thallium)
- B (A neutral oxide) → S (Carbon monoxide)
- C (An element with stable +2 oxidation state) → P (Lead)
- D (Solid carbon dioxide) → Q (Dry ice)

### Conclusion
The final matches are:
- A → R
- B → S
- C → P
- D → Q

Thus, the correct option based on the matches is **Option 2: RSPQ**.