The correct option is A Gram - dicot, Wheat - monocot, Rice - monocot, Pumpkin - dicot, Maize - monocot, Pea - dicot
Monocot plants show seeds with one cotyledon. They show fibrous root system and leaves with parallel venation.
Dicot plants show seeds with two cotyledons. They have tap root system and reticulate venation.
Gram, pea, pumpkin all have two cotyledons in the seed, so they are dicots. Rice, wheat, maize all have one cotyledon in their seed, so they are monocots. Hence, option A is correct.