​Which one of the following small molecule neurotransmitters is NOT synthesized from tyrosine?​

Correct option is C

Explanation-

Option a - Epinephrine
Synthesized from tyrosine via:
Tyrosine → L-DOPA → Dopamine → Norepinephrine → Epinephrine

Option b - Dopamine
Synthesized from tyrosine via:
Tyrosine → L-DOPA → Dopamine

Option c - Serotonin
NOT synthesized from tyrosine
Serotonin is synthesized from tryptophan, not tyrosine.
Tryptophan → 5-HTP → Serotonin

Option d - Norepinephrine
Synthesized from tyrosine via:
Tyrosine → L-DOPA → Dopamine → Norepinephrine
​
So, the correct answer is option c — Serotonin