A

Schedule H drugs are classified in India as “prescription-only”; Rule 65 of the Drugs and Cosmetics Rules mandates that they be dispensed by a pharmacist only against a valid prescription from a registered medical practitioner. Schedule G carries only a cautionary label, Schedule X drugs need an additional narcotic licence and record-keeping, and Schedule M deals with Good Manufacturing Practices, not dispensing requirements. Hence the requirement stated in the question corresponds to Schedule H drugs [Nagaraj 2015, PMID 26266135; Farooqui 2020, PMID 34223031].