Step 1: Farm holding classification in India.
- Marginal: Less than 1 hectare.
- Small: 1–2 hectares.
- Semi Medium: 2–4 hectares.
- Medium: 4–10 hectares.
- Large: Above 10 hectares.
Step 2: Ascending order.
From smallest to largest: Marginal<Semi Medium<Medium<Large.
Step 3: Matching with given letters.
- B = Marginal (smallest).
- C = Semi Medium (next).
- D = Medium (larger).
- A = Large (largest).
Step 4: Correct sequence.
Therefore, the correct order is B, C, D, A.