This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: All India exam, Subject name: Pharmacology
[{'content': 'The second messengers cyclic AMP and cyclic GMP (REPEAT) \nSelect and explain. \nA. Activate the same signal transduction pathways, B. Are generated by the activation of cyclases, C. Activate the same protein kinase, D. Are impoant only in sensory transduction', 'role': 'user'}, {'content': 'Answer: B \nExplanation: .', 'role': 'assistant'}]