Counterfeit medicines are:
1. Medicines which are mislabelled.
2. Medicines which have correct ingredients.
3. There is no active ingredient in the medicine.
4. There is a wrong ingredient in the medicine.
5. The medicine is in sufficient quantity.

Correct option is D

Counterfeit medicines are fake drugs that are fraudulently produced and can harm patients.
· (1) Medicines which are mislabelled – Correct, as counterfeit medicines often contain incorrect or misleading labels.
· (2) Medicines which have correct ingredients – Incorrect, as counterfeit medicines typically do not contain the correct active ingredients.
· (3) There is no active ingredient in the medicine – Correct, as many counterfeit drugs lack essential components.
· (4) There is a wrong ingredient in the medicine – Correct, as counterfeit medicines may contain harmful substances.
· (5) The medicine is in sufficient quantity – Incorrect, as counterfeit drugs often contain improper dosages.
Explanation of Other Options:
· (a) 1, 4 and 5 – Incorrect, as statement 5 is not true.
· (b) 2, 3, 4 and 5 – Incorrect, as statement 2 is false.
· (c) 1, 4 and 3 – Incorrect, as statement 3 is not true.
· (d) 1, 3 and 4 – Correct answer, as these define counterfeit medicines properly.