Question

The ________ are also called as cytotoxic T-cell.

• A. killer T cells
• B. suppressor T cells
• C. memory T cells
• D. helper T cells

Hint:

Cytotoxic T cells directly kill infected and foreign cells.

Answer 1

The Correct Option is A

Step 1: Understanding the Concept
Cytotoxic T cells (CD8 positive) recognise virus infected, cancerous or foreign cells and destroy them directly.

Step 2: Other name
Because of this killing action, they are also called killer T cells.

Step 3: Other options
Helper T cells assist B cells and other T cells, memory T cells remember the antigen, and suppressor T cells reduce the immune response.

Final Answer:
Cytotoxic T cells are also called killer T cells. \[ \boxed{\text{(A) }\text{killer T cells}} \]