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Which of the following compounds does NOT contain a sulphur atom?

1. Cimetidine
2. Ranitidine
3. Histamine
4. Saccharin

Correct answer: Histamine

Solution

Cimetidine and ranitidine both contain sulphur, and saccharin has a sulphur in its sulfonyl group; histamine (imidazole ethylamine) contains no sulphur.

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