Plants which produce characteristic pneumatophores and show vivipary belong to?

The correct option is C Halophytes. Halophytes are plants that grow in salt-rich soil because they are physiologically adapted to withstand its high salinity. Such soil is found in salt marshes and mudflats. These plants have pneumatophores. Pneumatophores are modified roots that grow upwards out of the water or mud to reach the air and thus obtain oxygen for their plant root systems that live in swampy or tidal habitats. These plants exhibit vivipary which is the condition of seed germination while still attached to the parent plant. For example- mangroves. Thus, the correct answer is option C.