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.

MICROSCOPE

TELESCOPE

STETHOSCOPE

PERISCOPE

APEDIA

BPSC Prelims

2025 • 13 Sep, 2025 • General

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.

Correct Answer

STETHOSCOPE

Visual Aids: Microscope, Telescope, and Periscope are all optical instruments. They utilize lenses and mirrors to view objects that are small, distant, or obstr......

💡 Analysis & Explanation

Visual Aids ▼

Microscope, Telescope, and Periscope are all optical instruments. They utilize lenses and mirrors to view objects that are small, distant, or obstructed.

Auditory Aid ▼

The Stethoscope is a medical acoustic device. It is specifically designed for auscultation, or listening to internal sounds of an animal or human body.

Principle Difference ▼

The first three rely on the laws of reflection and refraction of light, while the stethoscope relies on the transmission of sound waves.

Conclusion ▼

Stethoscope is the odd one out as it relates to hearing, whereas the others relate to seeing.

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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.