'Y' is a plant which does not have Chlorophyll. What could 'Y' be?

Concept: Chlorophyll is the green pigment in plant cells that absorbs light energy for photosynthesis, the process by which a plant manufactures its own food. A plant that lacks chlorophyll cannot photosynthesize, so it must get its nourishment in another way, most commonly by living as a parasite on a host plant.

Application: Cuscuta (dodder) is a leafless, twining parasitic vine with no chlorophyll of its own. It attaches to a host plant with root-like structures called haustoria, which penetrate the host's vascular tissue and draw out water, minerals, and ready-made food, so Cuscuta survives without ever photosynthesizing.

• Algae: contain chlorophyll (and often additional pigments) and are photosynthetic, manufacturing their own food using sunlight.

• Pitcher plant: is green and chlorophyll-bearing and photosynthesizes for its energy needs; its pitcher-shaped leaves separately trap and digest insects only to supplement mineral nutrition, not to replace photosynthesis.

• Maple tree: is a chlorophyll-bearing deciduous tree whose green leaves photosynthesize; its foliage turns colour in autumn only because chlorophyll breaks down and the other pigments already present become visible.

Result: Among the options, only Cuscuta is a non-photosynthetic parasite that lacks chlorophyll, so 'Y' is Cuscuta.