Assertion (A): Cross of `F_(1)` individual with recessive homozygous parent is test cross.
Reason ( R): No recessive individual are obtained in the monohybrid test cross progeny.

Options

A. Both assertion (A) and reason ( R) are true and reason ( R) is the correct explanation of assertion (A).
B. Both assertion (A) and reason ( R) are true but reason ( R) is not the correct explanation of assertion (A).
C. Assertion (A) is true but reason ( R) is false.
D. Assertion (A) is false but reason ( R) is true.

Explanation

### Step-by-Step Solution:

1. **Understanding the Assertion (A)**:
- The assertion states that a cross of F1 individuals with a recessive homozygous parent is a test cross.
- A test cross is performed to determine the genotype of an individual showing a dominant phenotype. This is done by crossing it with a homozygous recessive individual.

2. **Evaluating the Reason (R)**:
- The reason states that no recessive individuals are obtained in the monohybrid test cross progeny.
- In a monohybrid test cross, if the F1 individual is heterozygous (e.g., Tt) and is crossed with a homozygous recessive (tt), the offspring can be either dominant (Tt) or recessive (tt). Thus, recessive individuals can indeed be produced.

3. **Conclusion**:
- The assertion is correct because a test cross is defined as the cross between a dominant phenotype and a homozygous recessive individual.
- The reason is incorrect because recessive individuals can be obtained in a monohybrid test cross when the F1 individual is heterozygous.

4. **Final Answer**:
- Therefore, the correct answer is: Assertion (A) is true, and Reason (R) is false.