The correct option is
C A - 4, B - 3, C - 2, D - 1
- Wheat belongs to order 'Poales'and mango belongs to order 'Sapindales'.
- House fly belongs to order 'Diptera' and man belongs to order 'Primata'.
So, the correct option is 'A - 4, B - 3, C - 2, D - 1'.