Read the following statements regarding sexual reproduction and select the set of correct statements.
(a.) Sexual reproduction mostly involves 2 parents.
(b.) It generally involves gametic fusion.
(c.) Meiosis does not occur in sexual reproduction.
(d.) External fertilization is a characteristic of sexual reproduction.

Options

A. a and c
B. a and b
C. c and d
D. a , b and d

Answer

To solve the question regarding the statements about sexual reproduction, we will analyze each statement one by one to determine which are correct.

### Step 1: Analyze Statement (a)
**Statement (a): Sexual reproduction mostly involves 2 parents.**
- This statement is correct. Sexual reproduction typically requires two parents, one male and one female, to contribute gametes for fertilization.

### Step 2: Analyze Statement (b)
**Statement (b): It generally involves gametic fusion.**
- This statement is also correct. Sexual reproduction involves the fusion of gametes (sperm and egg) during fertilization, which is a key characteristic of this type of reproduction.

### Step 3: Analyze Statement (c)
**Statement (c): Meiosis does not occur in sexual reproduction.**
- This statement is incorrect. Meiosis is essential in sexual reproduction as it produces haploid gametes from diploid cells. Without meiosis, gametes cannot be formed.

### Step 4: Analyze Statement (d)
**Statement (d): External fertilization is a characteristic of sexual reproduction.**
- This statement is misleading. While external fertilization (like in many aquatic animals) is a form of sexual reproduction, it is not the only method. Internal fertilization (as seen in mammals) is also a common characteristic of sexual reproduction. Therefore, this statement is incorrect.

### Conclusion
From the analysis:
- Correct statements are (a) and (b).
- Incorrect statements are (c) and (d).

Thus, the correct set of statements regarding sexual reproduction is **(a) and (b)**.

### Final Answer
The correct answer is option **B** (statements a and b are correct).

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