A : Biosphere reserves are also included under the ex-situ conservation strategies.
R : Cropping and grazing are allowed in the transition zone of biosphere reserve.

Options

A. If both Assertion & Reason are true and the reason is the correct explanation od the assertion, then mark(1)
B. If both Assertion & Reason are true but the reason is not the correct expanation of the assertion, then mark (2)
C. If Assertion is true statements but Reason is false, then mark (3)
D. If both Assertion and Reason are false statements, then mark(4).

Answer

### Step-by-Step Solution:

1. **Understanding the Assertion (A)**: The assertion states that "Biosphere reserves are also included under the ex-situ conservation strategies."
- **Analysis**: Ex-situ conservation refers to the conservation of species outside their natural habitats, such as in zoos or botanical gardens. Biosphere reserves, however, are areas designated for the conservation of biodiversity in their natural environment, which means they fall under in-situ conservation strategies.

2. **Understanding the Reason (R)**: The reason states that "Cropping and grazing are allowed in the transition zone of biosphere reserve."
- **Analysis**: Biosphere reserves consist of three zones: the core zone, buffer zone, and transition zone. The transition zone is the outermost area where human activities, including cropping and grazing, are permitted. This statement is true.

3. **Evaluating the Truth of A and R**:
- Since the assertion (A) is false (biosphere reserves are not ex-situ conservation), and the reason (R) is true (cropping and grazing are allowed in the transition zone), we can conclude that the assertion and reason do not support each other.

4. **Final Conclusion**: Based on the analysis, the correct evaluation is that the assertion is false, and the reason is true.

### Final Answer:
Both assertion (A) and reason (R) are false statements.