Concept: This question tests your knowledge of modified underground stems, specifically identifying examples of a rhizome.

Why (C) is correct: Garlic is an example of a bulb, which is a modified underground stem where the stem is reduced to a disc, and the leaves are fleshy and store food. The edible part of garlic consists of cloves, which are actually axillary buds.

Why other options are wrong:
(A) Ginger: Ginger is a classic example of a rhizome, an underground stem that grows horizontally.
(B) Turmeric: Turmeric is also an example of a rhizome, similar to ginger, growing horizontally underground.
(D) None: Since garlic is not a rhizome, this option is incorrect.

Common Mistake: Students often confuse different types of modified underground stems like rhizomes, corms, tubers, and bulbs due to their similar appearance and underground location.

NEET Tip: Remember that rhizomes (Ginger, Turmeric) grow horizontally, while bulbs (Onion, Garlic) have a reduced disc-like stem and fleshy leaves. Corms (Colocasia, Gladiolus) are condensed, vertical underground stems, and tubers (Potato) are swollen tips of underground branches.

Correct Answer: (C)