Read the following statements and select the correct option:
(a) A population in which most individuals are in pre-reproductive age group is likely to grow rapidly in future.
(b) Many individuals in that population will begin to reproduce soon.

Options

A. (b) is correct but (a) is false
B. Both (a) and (b) are true
C. (a) is correct but (b) is false
D. Both (a) and (b) are false

Answer

To solve the question, we need to analyze the two statements provided regarding a population with a majority of individuals in the pre-reproductive age group.

### Step-by-Step Solution:

1. **Understanding Pre-Reproductive Age**:
- The pre-reproductive age group typically includes individuals who are not yet capable of reproduction but are close to reaching reproductive maturity. This age group generally includes individuals from birth up to around 14 years of age.

2. **Analyzing Statement (a)**:
- The first statement claims that a population in which most individuals are in the pre-reproductive age group is likely to grow rapidly in the future.
- Since these individuals will soon reach reproductive age, it is logical to conclude that once they mature, they will begin to reproduce, leading to an increase in the population size. Therefore, this statement is **correct**.

3. **Analyzing Statement (b)**:
- The second statement asserts that many individuals in that population will begin to reproduce soon.
- Given that the majority of individuals are in the pre-reproductive age group, it follows that they will soon enter the reproductive age and start reproducing. Thus, this statement is also **correct**.

4. **Conclusion**:
- Since both statements (a) and (b) are correct, the correct option is that both statements are true.

### Final Answer:
Both statements (a) and (b) are true.