Statement I. From the region of elongation, some of the epidermal cells form root hairs. This statement is wrong as root hairs are formed from the region of maturation.

Statement II. Pneumatophores are seen in Rhizophora. This statement is correct as Pneumatophores are the breathing roots. And Rhizophora is an exampkle of breathing roots.

Statement III. Adventitious roots are seen in the banyan tree. This statement is correct because in Banyan tree special roots to support the tree are grown out from the branches. The roots developing from any other part of the plant except radicle are called adventitious roots.

Statement IV. Maize and sugarcane have prop roots. This statement is wrong as prop roots are the pillar like roots arising from the branches. The roots found in sugar cane and maize are stilt roots.

Hence option D is correct.