This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: None, Subject name: Physiology
[{'content': 'Cell drinking is also known as: \nSelect and explain. \nA. Phagocytosis, B. Pinocytosis, C. Endocytosis, D. None of the above', 'role': 'user'}, {'content': 'Answer: B \nExplanation: Pinocytosis ("cell drinking") is a similar process with the vesicles much smaller in size and the substances ingested are in solution. Ref: Ganong\'s Review of Medical Physiology 23rd edition, Chapter 2.', 'role': 'assistant'}]