question_answer

Which of the following statement represent hydroponics?

(i) Is useful in areas having thin; infertile and dry soils.

(ii) Can regulate pH optimum for a particular crop.

(iii) Increases labour cost.

(iv) Increases problem of weeding.

A) (i),(ii) and (iii)    

B)        (i) and (ii)

C)        (ii) and (iv)                    

D)        (i) and (iii) .