Match List I with List II. List-I List-II a. Hydrofluoric acid 1. Etching of glass b. I2 dissolved in alcohol 2. Antiseptic c. Chlorine 3. Disinfectant d. Polyvinyl chloride 4. Plastic A. a-1, b-2, c-3, d-4 B. a-2, b-3, c-4, d-1 C. a-3, b-4, c-1, d-2 D. a-4, b-1, c-2, d-3

The correct answer is: A. a-1, b-2, c-3, d-4

Hydrofluoric acid is a strong acid that can be used to etch glass. Iodine dissolved in alcohol is an antiseptic. Chlorine is a disinfectant. Polyvinyl chloride is a plastic.

Here is a brief explanation of each option:

• Option A: a-1, b-2, c-3, d-4. This is the correct answer. Hydrofluoric acid is a strong acid that can be used to etch glass. Iodine dissolved in alcohol is an antiseptic. Chlorine is a disinfectant. Polyvinyl chloride is a plastic.
• Option B: a-2, b-3, c-4, d-1. This is not the correct answer. Iodine dissolved in alcohol is an antiseptic, not a disinfectant. Chlorine is a disinfectant, not an antiseptic.
• Option C: a-3, b-4, c-1, d-2. This is not the correct answer. Polyvinyl chloride is a plastic, not an antiseptic. Iodine dissolved in alcohol is an antiseptic, not a plastic.
• Option D: a-4, b-1, c-2, d-3. This is not the correct answer. Polyvinyl chloride is a plastic, not a disinfectant. Chlorine is a disinfectant, not a plastic.