Incorrect match is

Options

A. Nylon-6: Caprolactum
B. Buna-N : Elastomer
C. Alitame : Artificial sweetner
D. Antithistamine : Ranitidine

Answer

To solve the question regarding the incorrect match, we will analyze each option provided in the question.

### Step-by-Step Solution:

1. **Identify the Terms in Each Option**:
- We have four options to evaluate:
1. Nylon 6 - Caprolactam
2. BUNA-N - Nitrile rubber
3. L-etam - Artificial sweetener
4. Ranitidine - Antihistamine

2. **Evaluate Each Pair**:
- **Nylon 6 - Caprolactam**:
- Nylon 6 is indeed a type of polyamide formed from the monomer caprolactam. This pair is correct.

- **BUNA-N - Nitrile rubber**:
- BUNA-N is recognized as a type of nitrile rubber, which is an elastomer. This pair is also correct.

- **L-etam - Artificial sweetener**:
- L-etam (often referred to as aspartame) is indeed an artificial sweetener. This pair is correct as well.

- **Ranitidine - Antihistamine**:
- Ranitidine is actually classified as an antacid, not an antihistamine. Antihistamines are used to treat allergies, while antacids neutralize stomach acid. This pair is incorrect.

3. **Conclusion**:
- The incorrect match is **Ranitidine - Antihistamine**. Therefore, the answer to the question is option number 4.

### Final Answer:
The incorrect match is **Ranitidine - Antihistamine**.

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