- A Rhizome
- B Tuber
- C Corm
- D Bulb
Correct answer: D. Bulb
Explanation: Onion is a bulb - a modified underground stem with a short stem base bearing fleshy scale leaves (modified leaves) that store food. Other examples: garlic, tulip, lily.
Concept context
External structure of roots, stems, and leaves plus internal tissue organization. High marks in Class 11 and NEET.