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State PCS PYQPrelims 2025

BPSC – Combined Competitive Examination · Question 1

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

  1. MICROSCOPE
  2. TELESCOPE
  3. STETHOSCOPE
  4. PERISCOPE
Show answer & explanation

Answer: (C) STETHOSCOPE

Explanation

Microscope, telescope and periscope are optical instruments for seeing; the stethoscope is for hearing.

  • (A) Incorrect

    Wrong: a microscope is an instrument for seeing (magnifying small objects).

  • (B) Incorrect

    Wrong: a telescope is an instrument for seeing distant objects.

  • (C) Correct

    Correct: a stethoscope is used for hearing body sounds; the other three are used for seeing.

  • (D) Incorrect

    Wrong: a periscope is an instrument for seeing over or around obstacles.