Concept: This question tests your knowledge of the botanical classification of common plants, specifically identifying the family to which Allium cepa (onion) belongs.

Why (B) is correct: Allium cepa, commonly known as onion, is a monocotyledonous plant that belongs to the family Liliaceae. This family is characterized by plants with bulbs, parallel venation in leaves, and flowers with parts in multiples of three.

Why other options are wrong:

• (A) Solanaceae: This family includes plants like potato, tomato, brinjal, and chili.
• (C) Cruciferae (Brassicaceae): This family includes plants like mustard, cabbage, and radish.
• (D) Compositae (Asteraceae): This family includes plants like sunflower, marigold, and daisy.

NEET Tip: Memorize the botanical names and families of common economically important plants and those frequently mentioned in NCERT textbooks.

Correct Answer: (B)