Question

Number of lymphocytes present in a healthy human is

• A. 1 trillion
• B. 100 billion
• C. 10 trillion
• D. 100 trillion

Answer 1

The correct option is A 1 trillion

A lymphocyte is one of the subtypes of white blood cell in a vertebrate's immune system. Lymphocytes include natural killer cells (which function in cell-mediated, cytotoxic innate immunity), T cells (for cell-mediated, cytotoxic acquired immunity), and B cells (for humoral, antibody-driven adaptive immunity). The total number of lymphocytes present in healthy humans is approximately 1 trillion.

So, the correct answer is '1 trillion'.