The following are multiple choice questions (with answers) about medical knowledge.   **Question:** Which of the following cause an increase in ACh release from the presynaptic neuron?   (A) Blocking calcium channels on presynaptic   (B) Blocking chloride channel on presynaptic   (C) Blocking Na channel   (D) Blocking K channels
['(D) Blocking K channels <> answer', 'The following are multiple choice questions (with answers) about medical knowledge. <> instruction', '(A) Blocking calcium channels on presynaptic \n (B) Blocking chloride channel on presynaptic \n (C) Blocking Na channel \n (D) Blocking K channels <> possible answers', '  Which of the following cause an increase in ACh release from the presynaptic neuron? <> context@']