Which of the following is not a stem modification?

1. A. (1) Pitcher of Nepenthes
2. B. (2) Thorns of citrus
3. C. (3) Tendrils of cucumber
4. D. (4) Flattened structures of Opuntia

Attempt this NEET 2016 Biology question free — pick an option to reveal the correct answer and a step-by-step explanation. Then join NEET Mastery Quest to practise 15,000+ PYQ and 2027-syllabus questions.