A consulting pharmacist informed a patient about possible side effect of metronidazole that is normally provoked by alcohol intake. What is the mechanism of this phenomenon?

Answer options

1. Enzyme glucose 6-phosphate dehydrogenase activation
2. Enzyme alcohol dehydrogenase activation
3. Enzyme alcohol dehydrogenase blocking
4. Enzyme acetylcholinesterase activation
5. Enzyme acetylcholinesterase blocking