Final answer:
Option (2), An otoscope is the correct instrument used to examine the ear, which is different from an ophthalmoscope that is used for eye examinations.
Step-by-step explanation:
To examine the ear, you would use an otoscope. An otoscope is a tool specifically designed for visual inspection of the ear canal and eardrum, allowing healthcare professionals to diagnose ear infections, blockages, and other auditory issues. In contrast, an ophthalmoscope is used for examining the interior structures of the eye, such as the retina and optic nerve.
Both of these instruments are examples of endoscopes, which are devices used to look inside the body for medical examination or surgery. It's crucial for medical professionals and students to understand the functions and proper use of these diagnostic tools.