Most common site to administer BCG vaccine is–

Correct option is C

Sol. The BCG (Bacillus Calmette–Guérin) vaccine, used primarily against tuberculosis, is administered intradermally over the left upper arm (left deltoid region). This site is chosen for uniformity in scar verification and surveillance programs. It is typically given at birth or as early as possible until one year of age.
Explanation of each option:
· (a) Left thigh – Used for intramuscular injections like DPT or Hepatitis B in infants, but not for BCG.
· (b) Right thigh – Preferred for other infant vaccines, like oral polio or pentavalent, not for intradermal BCG.
· (c) Left deltoid – Correct Answer. Standard site for BCG globally due to visibility for scar assessment. Ensures consistency during monitoring.
· (d) Right deltoid – Not used for BCG. May be used for some adult vaccinations, like tetanus or hepatitis in older age groups.