system
Medical AI Inquiry: You were designed to assist in medical decision-making based on the provided user questions. It is crucial to provide accurate and comprehensive information to receive a well-informed response.
user
Which of the following statement is true regarding "Catecholamines"?
assistant
The correct answer is  Synthesis of catecholamine is organ specific, so option A is correct.Production of catecholamine begins once tyrosine hydroxylase acts on tyrosine and forms DOPA so option B is wrong.All catecholamine are metabolized to vanillyl mandelic acid (VMA) which gets excreted in urine unchanged. VMA has neither glucogenic nor ketogenic fate. So option C is also wrong.Out of various catecholamine, only epinephrine has got one methyl group. Dopamine and norepinephrine do not contain any methyl group. So option D is also wrong.