Match List I and List II

1-b; 2-d; 3-a; 4-c

The correct answer is option 3. 1-b; 2-d; 3-a; 4-c.

Let us break down each match:

1. Food Preservative - (b) Sodium benzoate:

Sodium benzoate is commonly used as a food preservative to inhibit the growth of bacteria, yeast, and fungi in acidic foods and beverages. It works by reducing the pH of the food, creating an environment where microorganisms are less likely to thrive.

2. Anti-depressant - (d) Equanil:

Equanil, also known as meprobamate, is not primarily used as an antidepressant. It belongs to a class of medications known as anxiolytics or tranquilizers, which are used to relieve anxiety and tension. While it may have some calming effects, it is not typically prescribed as an antidepressant.

3. Lowers Blood Pressure - (a) Reserpine:

Reserpine is a medication that works by reducing the concentration of certain neurotransmitters in the brain, particularly norepinephrine and dopamine. By doing so, it helps to relax blood vessels and decrease blood pressure. It is commonly used to treat hypertension (high blood pressure).

4. Pain Reliever - (c) Analgesic:

None of the options provided directly match a specific pain reliever. However, the term "analgesic" refers to a broad category of medications that are used to relieve pain. This category includes various drugs such as nonsteroidal anti-inflammatory drugs (NSAIDs), opioids, and others.

Summary:

Sodium benzoate is indeed used as a food preservative.

Equanil (meprobamate) is not primarily used as an antidepressant but as an anxiolytic or tranquilizer.

Reserpine is used to lower blood pressure.

None of the options provided directly match a specific pain reliever, but analgesics are medications used for pain relief.