In which of the following plants, modified roots meant for getting oxygen for respiration are found? 

Rhizophora grows in oxygen deficient water-logged swampy areas and many of its roots come out of the soil and have lenticels or pneumathodes which help in getting oxygen for respiration. Monstera has aerial adventitious roots meant for only fixing the plant on the host plant. Banyan tree has aerial adventitious roots that help in giving support to horizontal branches. Sweet potato has underground storage adventitious roots.