Modified stems are neither completely aerial nor totally underground or underwater in 

detailed solution

Correct option is B

In some grasses like Agropyron, in strawberry, potato, ginger, turmeric, onion, garlic, lily, zaminkand, and Colocasia modified stems are totally underground. Modified stems or branches are totally aerial in cucumber, pumpkin, watermelon, grapevine, Bougainvillea, Citrus, Opuntia and Euphorbia. In mint and jasmine have sub-aerial modified stems like stolons. Pistia and Eichhornia have sub-aerial modified stems offsets. In banana, pineapple and Chrysanthemum the sub-aerial stems suckers are present.