A

At 16–24 months (including 18 months), the Indian National Immunization Schedule gives the first booster of DPT, an OPV booster and the second dose of a measles-containing vaccine (MMR). Rotavirus series must be finished by 32 weeks of age, so it is no longer indicated, and pentavalent/BCG are used earlier in infancy, not as boosters at this age [Balasubramanian 2018, PMID 30745480; Goel 2012, PMID 25145068; USPSTF 1989, PMID 2801458].