This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Medical, surgical and gynaecological illness complicating pregnancy, Subject name: Gynaecology & Obstetrics
[{'content': 'Which of the following tumors is not commonly known to increase in size during pregnancy ? \nSelect and explain. \nA. Glioma, B. Pituitary adenoma, C. Meningioma, D. Neurofibroma', 'role': 'user'}, {'content': 'Answer: A \nExplanation: Answer is option 1 Glioma Tumors which increase in pregnancy are : Meningioma, angioma, neurofibroma,pituitary adenoma (micro and macro) Ref.. Williams Obs 23/e p 1140 for options b and c For option d p1255', 'role': 'assistant'}]