This question belongs to morphology in flowering plants... Plzzzzzz reply

Dear student ....Answer is (B) ; Pneumatophores (in mangroves and other swamp plants) are aerial root specialized for gaseous exchange ; Ginger is modified underground stem ; Hydrophytes are emerged in water so, they do not posses well developed root system ; Root cap is present in underground roots ....With Regards ....Mahima....(AskIITians Forum Expert )