This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: General physiology, Subject name: Physiology
[{'content': 'Energy is required in which transpo process across cell membrane \nSelect and explain. \nA. Osmosis, B. Facilitated diffusion, C. Active transpo, D. Simple diffusion', 'role': 'user'}, {'content': 'Answer: C \nExplanation: The passage of substances against their electrical and chemical gradient at the expenditure of energy is called active transpo (REF: TEXTBOOK OF MEDICAL PHYSIOLOGY GEETHA N 2 EDITION, PAGE NO - 6)', 'role': 'assistant'}]