71st BPSC Prelims (2025), question 1

🧮 Mental Ability

1. Out of four words given, three are alike in some manner and the fourth is different. Find the different one.

   1. Microscope
   2. Telescope
   3. Stethoscope
   4. Periscope
   Show answer

   Answer: D — Periscope

   Microscope, Telescope and Stethoscope all involve magnification/observation of small or distant things via lenses; a Periscope is used for viewing around obstacles, not for magnification.

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