Matching the schedules of the Drugs and Cosmetics Rules, 1945 with their descriptions:
- Schedule Y specifies the requirements and guidelines on clinical trials for the import and manufacture of new drugs. Therefore, 1 matches with c.
- Schedule G lists the drugs that are to be used under medical supervision and which are to be labeled accordingly. Therefore, 2 matches with d.
- Schedule N prescribes the requirements for the space, equipment, and other facilities required for the operation of a blood bank and for the processing of blood components. Therefore, 3 matches with a.
- Schedule P specifies the life period (shelf life) of drugs. Therefore, 4 matches with b.
The correct matching is 1-c, 2-d, 3-a, 4-b.