The correct option is B Cuscuta
Parasitic mode of nutrition is a heterotrophic mode of nutrition where an organism called parasite lives on or inside an organism called host and derives nutrition from it.
This type of nutrition is observed in cuscuta (dodder). This plant is leafless and cannot perform photosynthesis. Hence, it lives on other plants and obtains the food through roots called haustoria. These roots penetrate into the host plant up to their conducting vessels to absorb food and water.