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
Which ophthalmological investigation is being performed on the patient? 
Select and explain. 
A. Retinoscopy, B. Indirect ophthalmoscopy, C. Direct ophthalmoscopy, D. Oblique illumination test
C: Direct ophthalmoscopy
Answer: C: Direct ophthalmoscopy 
Explanation: 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.