The following are multiple choice questions (with answers) about medical knowledge.   **Question:** An adult came to casualty with complaints of rapid hea rate. On examination everything else was normal except for episodic tachycardia and occasional extra-systole and amblyopia. Which of the following is the cause of it?   (A) Nicotine   (B) Cannabis   (C) Atropine   (D) Cocaine
['(A) Nicotine <> answer', 'The following are multiple choice questions (with answers) about medical knowledge. <> instruction', '(A) Nicotine \n (B) Cannabis \n (C) Atropine \n (D) Cocaine <> possible answers', '  An adult came to casualty with complaints of rapid hea rate. On examination everything else was normal except for episodic tachycardia and occasional extra-systole and amblyopia. Which of the following is the cause of it? <> context@']