How many statements are true related to HIV infection?
a) It belongs to group of retro virus
b) It contains single stranded DNA
c) Entry into human cells requires CD-4 receptor and CXCR4, CCR5 Co-receptors
d) It reduces number of T-helper cells

Options

A. One
B. Two
C. Three
D. Four

Answer

To determine how many statements are true regarding HIV infection, we will analyze each statement one by one:

1. **Statement a: It belongs to a group of retroviruses.**
- **Analysis:** HIV is indeed classified as a retrovirus. Retroviruses are characterized by having RNA as their genetic material. Therefore, this statement is **true**.

2. **Statement b: It contains single-stranded DNA.**
- **Analysis:** HIV does not contain single-stranded DNA; instead, it has two molecules of single-stranded RNA. Thus, this statement is **false**.

3. **Statement c: Entry into human cells requires CD-4 receptor and CXCR4, CCR5 co-receptors.**
- **Analysis:** HIV requires the CD4 receptor for entry into T-helper cells and also utilizes co-receptors CXCR4 and CCR5 for successful entry into the host cells. Therefore, this statement is **true**.

4. **Statement d: It reduces the number of T-helper cells.**
- **Analysis:** HIV specifically targets and infects T-helper cells, leading to a reduction in their numbers. This reduction is a key factor in the immunodeficiency associated with HIV infection. Thus, this statement is **true**.

**Summary of True Statements:**
- Statement a: True
- Statement b: False
- Statement c: True
- Statement d: True

**Total True Statements:** 3

**Final Answer:** There are **3 true statements** related to HIV infection.

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