Question

Which is the smallest of these four?

• A. bacterium
• B. red blood cells
• C. virus
• D. lymphocytes

Answer 1

The correct option is C

virus

The correct option is option C :

The Explanation for the correct option :

1. Viruses are disease-causing agents of pathogens.
2. Viruses are not supposed to be live, they are non-living and smaller than a cell.
3. They contain packages of nucleic acid and proteins.
4. Hence, viruses are smallest than the living cells.

The explanation for the incorrect option :

Option A :

1. Bacteria are single-celled organisms.
2. Bacteria are larger than some cells and are about 1 micrometer to 5 micrometers.

Option B :

1. Red blood cells are the cells of the blood in living organisms.
2. These have sizes of about 7 to 8 micrometers.
3. RBCs carry hemoglobin in human beings.

Option D :

1. Lymphocytes are the type of white blood cells.
2. Lymphocytes are also 7 to 8 micrometers in size.

Final answer: Virus is the smallest of these four.