In the following question a statement of assertion (A) is followed by a statement of reason (R). Mark the correct choice as :
Assertion (A): Ganja is obtained from Cannabis sativa/hemp plant.
Reason (R): It is hallucinogenic, alters perception, causes illusion and damages cardiovascular system.

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 Text Solution:

1. **Understanding the Assertion (A)**:
- The assertion states that "Ganja is obtained from Cannabis sativa/hemp plant."
- This is a factual statement. Ganja, also known as marijuana, is indeed derived from the Cannabis sativa plant, which is commonly referred to as the hemp plant.

2. **Understanding the Reason (R)**:
- The reason states that "It is hallucinogenic, alters perception, causes illusion and damages the cardiovascular system."
- This statement is also true. Ganja contains psychoactive compounds, primarily THC (tetrahydrocannabinol), which can lead to hallucinations, altered perceptions, and other psychological effects. Additionally, long-term use of Ganja can have detrimental effects on the cardiovascular system.

3. **Evaluating the Relationship between Assertion and Reason**:
- Both the assertion and the reason are correct statements. The assertion accurately describes the source of Ganja, while the reason accurately describes its effects on the body.

4. **Conclusion**:
- Since both the assertion and the reason are correct, we can conclude that the correct choice is that both statements are true.

### Final Answer:
- The correct choice is **A**: Both Assertion (A) and Reason (R) are correct.