This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Endocrinology, Subject name: Pharmacology
[{'content': 'Bone resorption is enhanced by \nSelect and explain. \nA. PGD2, B. PDF2, C. PGE2, D. PGI2', 'role': 'user'}, {'content': 'Answer: C \nExplanation: Bone resorption is increased by prostaglandin E2. Increased PGE2 stimulates binding of RANK ligand to RANK- stimulating osteoclast-causing resorption (REF.Essential of medical pharmacology K D TRIPATHI 6 Edition, Page No - 325)', 'role': 'assistant'}]