`{:("Column I (Defect)", " Column II (Efect)"), ("(A) Ferrites" , "(p) Ferromagnetic"),("(B)" CrO_(2) , "(q) Paramagnetic"),("(C) Nitric oxide (NO)" , "(r) Ferrimagnetic"),("(D) Manganese dioxide" (MnO_(2)) , "(s) Antiferromagnetic"):}`

Options

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

Answer

To solve the problem of matching the defects in Column I with their corresponding effects in Column II, we will analyze each item in Column I and determine its magnetic property based on the information provided.

### Step-by-Step Solution:

1. **Identify the first item in Column I: Ferrites (A)**
- Ferrites are known to exhibit **antiferromagnetic** properties. In this case, the electron spins align in opposite directions but do not cancel each other out completely.
- **Match**: (A) Ferrites → (s) Antiferromagnetic

2. **Identify the second item in Column I: CrO₂ (B)**
- Chromium dioxide (CrO₂) is known to be **ferromagnetic**. This means the electron spins are aligned in the same direction.
- **Match**: (B) CrO₂ → (p) Ferromagnetic

3. **Identify the third item in Column I: Nitric oxide (NO) (C)**
- Nitric oxide (NO) is recognized as **ferrimagnetic**. This means that the spins are in opposite directions, but they do not completely cancel each other out.
- **Match**: (C) Nitric oxide (NO) → (r) Ferrimagnetic

4. **Identify the fourth item in Column I: Manganese dioxide (MnO₂) (D)**
- Manganese dioxide (MnO₂) is known to exhibit **paramagnetic** properties. This means it has unpaired electrons that align with an external magnetic field.
- **Match**: (D) Manganese dioxide (MnO₂) → (q) Paramagnetic

### Final Matches:
- (A) Ferrites → (s) Antiferromagnetic
- (B) CrO₂ → (p) Ferromagnetic
- (C) Nitric oxide (NO) → (r) Ferrimagnetic
- (D) Manganese dioxide (MnO₂) → (q) Paramagnetic

### Summary of Matches:
- A - s
- B - p
- C - r
- D - q

### Conclusion:
The correct order of matching is:
- (A) → (s)
- (B) → (p)
- (C) → (r)
- (D) → (q)