Which of the following statement is not correct ?

Options

A. Some disinfectants can be used as antiseptic at low concentration .
B. Aspirin is analgesic and antipyretic .
C. Norethindrone is an anti histamine .
D. Chloramphenicol is a broad spectrum antibiotic .

Explanation

To determine which statement is not correct, we will analyze each option provided in the question.

### Step-by-Step Solution:

1. **Option 1: Some disinfectants can be used as antiseptics at low concentrations.**
- This statement is **correct**. Certain disinfectants can indeed function as antiseptics when diluted to lower concentrations. For example, a 0.2% solution of phenol acts as an antiseptic, while a 1% solution serves as a disinfectant.

2. **Option 2: Aspirin is analgesic and antipyretic.**
- This statement is also **correct**. Aspirin is well-known for its properties as both an analgesic (pain reliever) and an antipyretic (fever reducer).

3. **Option 3: Norethindrone is an antihistamine.**
- This statement is **incorrect**. Norethindrone is not an antihistamine; it is a synthetic progesterone derivative primarily used as an anti-fertility drug. Antihistamines are drugs that counteract the effects of histamine in the body.

4. **Option 4: Chloramphenicol is a broad-spectrum antibiotic.**
- This statement is **correct**. Chloramphenicol is indeed classified as a broad-spectrum antibiotic, effective against a wide range of bacteria.

### Conclusion:
Based on the analysis, the statement that is **not correct** is **Option 3: Norethindrone is an antihistamine**.

### Final Answer:
**Option 3 is the incorrect statement.**

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