The technique of growing plants in nutrient solution, in the complete absence of soil, can be employed for:
(A) Identification of essentiality of mineral elements.
(B) Commercial production of vegetables.
(C) Studying the deficiency symptoms of a particular element.
(D) Conservation of germplasm.

Correct option is B

· Hydroponics is a method of growing plants in a nutrient solution without soil.
· It is used to identify essential mineral elements by studying their effects on plant growth.
· Commercial vegetable production in hydroponic systems is becoming increasingly popular.
· Deficiency symptoms of minerals can be studied effectively in a controlled hydroponic environment.
· However, it is not primarily used for germplasm conservation, so option (D) is incorrect.