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

Cuscuta (Amarbel) is a parasitic plant that lacks chlorophyll and depends on its host plant for nutrition. Algae, pitcher plants, and maple trees all contain chlorophyll. The pitcher plant is insectivorous to supplement its nitrogen needs but still photosynthesises with its chlorophyll. Hence Cuscuta is the correct answer.