The correct option is (c) Vanda.
Explanation:
The aerial or epiphytic roots are thick, irregular and hang down in the air. They do not have root caps and root hair. Instead they possess a covering of **** spongy tissue known as velamen. With the help of velamen the epiphytic roots are able to absorb water from moist atmosphere, dew and rain e.g., Vanda, Dendrobium, etc.
