The correct option is A I, II
DCMU is the used as herbicide because it blocks the electron flow in photosystem II and thus inhibits the photosynthesis. PMA is the mixed organic solvent that inhibits the metabolic activity especially close the stomata and thus reduce transpiration. It works as both fungicide and herbicides. A Colchicine is an alkaloid prepared from the dried corns and seeds of Colchicum autumnale. Colchicine is an oral drug used for treating acute gout and familial Mediterranean fever (FMF). Soilrite is used for seed germination, propagation of plants from cuttings. Thus, the correct answer is option A.