Step 1: Concept
The Drugs and Cosmetics Rules, 1945, include various schedules that categorize different regulatory requirements for drugs.
Step 2: Meaning
Each lettered schedule corresponds to a specific area of regulation, such as clinical trials, labeling, or pharmacy equipment.
Step 3: Analysis
Schedule Y pertains to clinical trials. Schedule G lists drugs to be taken under medical supervision. Schedule N specifies equipment for a pharmacy. Schedule P defines the life period (shelf-life) of drugs.
Step 4: Conclusion
Matching these correctly (1-c, 2-d, 3-a, 4-b) leads to the correct option.
Final Answer: (C)