Directions: In the following question, find out the alternative which will replace the blank.

Microphone: Loud :: Microscope: _________

Microphone makes sound louder (amplifies input), so the analogy expects what a microscope does. Microscope makes small objects appear larger (magnifies). 'Examine' is what you do with it, not what it does. 'Small' describes the input, not the function. 'Increase' is too vague - magnify specifically relates to visual enlargement.