To solve this question, we need to identify which plants reproduce vegetatively through roots.
1. Understanding Vegetative Reproduction:
Vegetative reproduction is a type of asexual reproduction in plants where new plants arise from vegetative parts such as roots, stems, and leaves.
2. Checking Given Options:
- (1) Colocasia and Ginger – Incorrect; these reproduce vegetatively through modified stems (rhizomes), not roots.
- (2) Murraya, Guava, and Millingtonia – Correct; these plants reproduce vegetatively through their roots (root suckers).
- (3) Bryophyllum and Scilla – Incorrect; Bryophyllum reproduces through leaves, and Scilla through bulbs.
- (4) None of the above – Incorrect; option (2) is correct.
Final Answer:
The correct answer is (B) Murraya, Guava, and Millingtonia.