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': 'Drug transpo process that requires energy \nSelect and explain. \nA. Active transpo, B. Passive diffusion, C. Conventive current, D. Pinocytosis', 'role': 'user'}, {'content': 'Answer: A \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'}]