This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Rectum, Subject name: Surgery
[{'content': 'Name the instrument shown here: \nSelect and explain. \nA. Sigmoidoscope, B. Colonoscope, C. Proctoscope, D. Rhinoscope', 'role': 'user'}, {'content': 'Answer: C \nExplanation: Ans. (c) Proctoscope* The scope used to examine anus and distal rectum is proctoscope.* We cannot examine proximal rectum with this - hence it is a misnomer to name it as proctoscope.', 'role': 'assistant'}]