2018 · Q22
Which one of the following statements about blood elements is correct?
general-sciencebiology-human-body
- ARed blood cells' number is same as that of white blood cells and platelets.
- BThe number of white blood cells is more than red blood cells.
- CThe number of red blood cells is the highest.
- DThe number of red blood cells is lower than platelets.
Explanation
Red blood cells (about 4.5–5.5 million per microlitre) vastly outnumber white blood cells (about 4,000–11,000 per microlitre) and platelets (about 1.5–4.5 lakh per microlitre). So the counts are not equal (A is wrong), WBCs do not exceed RBCs (B is wrong), and platelets do not exceed RBCs (D is wrong). Hence the number of red blood cells is the highest.