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  9. Q122

BPSC (Bihar PCS) 2025 · Question 122 of 145

In the following question, out of four words given below, three are alike in some manner and fourth word is different. Find the different one.

Mental Ability

  1. ATelescope
  2. BMicroscope
  3. CStethoscopeCorrect
  4. DPeriscope

Answer: C. Stethoscope

Explanation

Telescope, microscope, and periscope are optical instruments used for viewing (far objects, tiny objects, or around obstacles). A stethoscope is an acoustic instrument used to listen to internal body sounds, so it’s the odd one out.

Source: 71st BPSC CCE Prelims 2025 (Set H)

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