The following are multiple choice questions (with answers) about medical knowledge.   **Question:** GPCR that does not act through opening of potassium channels is?   (A) Muscarinic M2 receptor   (B) Dopamine D2 receptor   (C) Serotonin 5 HT1 receptor   (D) Angiotensin 1 receptor
['(D) Angiotensin 1 receptor <> answer', 'The following are multiple choice questions (with answers) about medical knowledge. <> instruction', '(A) Muscarinic M2 receptor \n (B) Dopamine D2 receptor \n (C) Serotonin 5 HT1 receptor \n (D) Angiotensin 1 receptor <> possible answers', '  GPCR that does not act through opening of potassium channels is? <> context@']