Poliomyelitis (polio) primarily affects children of which age group?

Correct option is C

Sol. Polio mainly affects children under the age of 5 years. It is a highly infectious disease caused by the poliovirus and can lead to permanent paralysis or even death in severe cases.
Explanation of each option: • (a) 3 years – Children of this age are vulnerable, but the risk spans a broader age group below 5 years. • (b) 4 years – Also a part of the high-risk age group, but does not represent the full range of vulnerability. • (c) 5 years – Correct. Children under 5 years are the most at risk, and polio vaccination is focused on this group. • (d) 6 years – Children over 5 are less commonly affected. By this age, they usually receive full polio immunization.