The correct option is B parasitic
Some plants like cuscuta (dodder) have yellow wire-like stems. They are leafless and are unable to carry out photosynthesis. They have sucking roots called haustoria. These plants are parasitic in nature and depend on other (host) plants for their food. The sucking (haustorial) roots in such plants help them in absorbing nutrients, i.e., water and food by penetrating into the conducting vessels of the host plant.