Which of the following is true about parasitic plants?

I) They absorb food from their host.

II) They compete with the host for sunlight.

III) They compete with host for water.

A parasitic plant is one that derives some or all of its substances from another plant. They are non – green plants and have a modified root, the Haustoria that penetrate the host plant and connect to the xylem, phloem or both. Hence, D is the correct option.