Which of the following compounds are not used as disinfectants?
A.Chloroxylenol
B.Bithional
C.Veronal
D.Prontosil
E.Teripineol
Choose the correct answer from the options given below :

Options

A. A, B, E
B. B,C, D
C. A, B
D. B, D, E

Answer

To determine which of the following compounds are not used as disinfectants, we will analyze each option provided in the question.

### Step 1: Analyze each compound

1. **Chloroxylenol**:
- Chloroxylenol is commonly used as a disinfectant. It is effective against bacteria and is often found in household disinfectants.

2. **Bithional**:
- Bithional is primarily used as an antiseptic and is not classified as a disinfectant. It is used in some soaps and skin cleansers but does not serve the same purpose as disinfectants.

3. **Veronal**:
- Veronal is a sedative and is not used for disinfecting purposes. It is a barbiturate that acts as a central nervous system depressant.

4. **Prontosil**:
- Prontosil is an antibiotic that was one of the first sulfa drugs used to treat bacterial infections. It is not used as a disinfectant.

5. **Terpineol**:
- Terpineol is a natural monoterpenoid alcohol that is used as a disinfectant and has antimicrobial properties.

### Step 2: Identify compounds not used as disinfectants
From the analysis:
- **Bithional** (B) is not a disinfectant.
- **Veronal** (C) is not a disinfectant.
- **Prontosil** (D) is not a disinfectant.

### Conclusion
The compounds that are not used as disinfectants are:
- **Bithional (B)**
- **Veronal (C)**
- **Prontosil (D)**

Thus, the correct answer is **B, C, and D**.