Select true statement :

Options

A. Viruses are obligate parasites
B. In Lichens, algal component is called phycobiont
C. In Lichens, Fungal component is called mycobiont
D. All the above

Answer

To solve the question "Select true statement," we will evaluate each option provided in the video transcript step by step.

### Step-by-Step Solution:

1. **Evaluate the First Statement:**
- The first statement is "Viruses are obligate parasites."
- This statement is true because viruses cannot reproduce on their own and must infect a host cell to replicate. They rely on the cellular machinery of the host to reproduce.

2. **Evaluate the Second Statement:**
- The second statement is "In lichens, the algal component is phycobiont."
- This statement is also true. In lichens, the algal component (which performs photosynthesis) is indeed referred to as phycobiont.

3. **Evaluate the Third Statement:**
- The third statement is "In lichens, the fungal component is called mycobiont."
- This statement is true as well. In lichens, the fungal partner is known as mycobiont.

4. **Evaluate the Fourth Statement:**
- The fourth statement is "All the above."
- Since all the previous statements (1, 2, and 3) are true, this statement is also true.

### Conclusion:
- Since all the statements are correct, the answer to the question is **Option 4: All the above.**