(A) : Endoscopy involves use of optical fibres to study internal organs
(R) : Optical fibres work based on phenomenon of total internal reflection.

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Both 'A' and 'R' are true and 'R' is not the correct explanation of 'A'

Both 'A' and ‘R’ are false

A' is true and 'R' is false

Both 'A' and 'R' are true and 'R' is the correct explanation of 'A'.

answer is B.

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Detailed Solution

Endoscopy is a process for viewing internal organs of human body. This process use a device endoscope. An endoscope is made of optical fibres.

Its core is made of optically denser material. Its outer cladding is made of optically rarer material. It is based on total internal reflection.

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