This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Retina, Subject name: Ophthalmology
[{'content': 'Which ophthalmological investigation is being performed on the patient? \nSelect and explain. \nA. Retinoscopy, B. Indirect ophthalmoscopy, C. Direct ophthalmoscopy, D. Oblique illumination test', 'role': 'user'}, {'content': 'Answer: C \nExplanation: Ans. (c) Direct ophthalmoscopyThe only confusion (if any) should be with Retinoscopy, as both the instruments look the same, but retinoscopy is usually performed from a distance of 1 meter.', 'role': 'assistant'}]