Assertion :- In multiple alleles many alleles are present in a population for a character.
Reason :- All these alleles are present in an individual.

Options

A. If both Assertion & Reason are True & the Reason is a correct explanation of the Assertion.
B. If both Assertion & Reason are trur but Reason is not a correct explanation of the Assertion.
C. If Assertion is True but the Reason is Flase.
D. If both Assertion & Reason are false.

Answer

### Step-by-Step Solution:

1. **Understanding the Assertion**:
- The assertion states that in multiple alleles, many alleles are present in a population for a character. This is true. In genetics, multiple alleles refer to the presence of more than two alleles for a particular gene within a population. An example of this is the ABO blood group system, which is controlled by three alleles: IA, IB, and i.

2. **Understanding the Reason**:
- The reason states that all these alleles are present in an individual. This is false. In a diploid organism, an individual can only possess two alleles for a given gene (one inherited from each parent). Therefore, while multiple alleles may exist in the population, an individual can only express one or two of those alleles.

3. **Evaluating the Relationship Between Assertion and Reason**:
- Since the assertion is true and the reason is false, we conclude that the reason does not correctly explain the assertion. The presence of multiple alleles in a population does not imply that all those alleles are present in any single individual.

4. **Final Conclusion**:
- Therefore, we can conclude that the assertion is true and the reason is false.

### Final Answer:
- Assertion: True
- Reason: False