The correct option is A halophytes
Pneumatophores or respiratory roots are found in halophytes. Halophytes are plants that grow in high salt conditions such as mangroves, marshes and swamps. As these areas are waterlogged, the roots face deficiency of oxygen. Hence, they form horizontal roots which give rise to vertically upward aerial roots at short intervals to facilitate aeration.
Hydrophytes are plants that grow on water. In case of hydrophytes, the roots are highly reduced. They are meant for anchorage only and not for absorption of water as their leaves are capable of absorbing water.
Carnivorous plants such as bladderworts grow in waterlogged soil but their body is not clearly separated into root, stem and leaves.