Which among the following statements are true for sexual reproduction in flowering plants?
(i) It requires two types of gametes.
(ii) Fertilisation is a compulsory event.
(iii) It always results in formation of zygote.
(iv) Offspring formed are clones.

Options

A. (i) and (iv)
B. (i), (ii) and (iv)
C. (i), (ii) and (iii)
D. (i), (ii) and (iv)

Explanation

To determine which statements are true for sexual reproduction in flowering plants, let's analyze each statement step by step:

1. **Statement (i): It requires two types of gametes.**
- In flowering plants, sexual reproduction involves the fusion of male and female gametes. The male gamete is typically found in pollen, while the female gamete is located in the ovule. Therefore, this statement is **true**.

2. **Statement (ii): Fertilisation is a compulsory event.**
- Fertilization is the process where the male and female gametes fuse to form a zygote. This fusion is essential for sexual reproduction to occur, as it leads to the formation of a new organism. Thus, this statement is also **true**.

3. **Statement (iii): It always results in formation of zygote.**
- Following fertilization, the fusion of the male and female gametes indeed results in the formation of a zygote. This zygote will eventually develop into a new plant. Therefore, this statement is **true**.

4. **Statement (iv): Offspring formed are clones.**
- Clones are genetically identical individuals produced through asexual reproduction. In sexual reproduction, the offspring inherit genetic material from both parents, leading to variations. Thus, the offspring are not clones but rather genetically diverse. Therefore, this statement is **false**.

**Conclusion:**
The true statements regarding sexual reproduction in flowering plants are:
- Statement (i): True
- Statement (ii): True
- Statement (iii): True
- Statement (iv): False

Thus, the correct answer is that statements 1, 2, and 3 are true.