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Nobel gas Use of Nobel gas
A He I X-ray photography to detect flaws in solids
B Ne II Sodium lamps
C Ar III Heat transfer agent in gas cooled reactors
D Rn IV To obtain glows of different colours
Correct match is

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A	B	C	D
III	II	IV	I

A	B	C	D
I	II	III	IV

A	B	C	D
II	III	IV	I

A	B	C	D
III	II	I	IV

answer is A.

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Detailed Solution

He Heat transfer agent

Ne Sodium lamps

Ar in neon signs for obtaining glows of different colours

Rn In X-ray photography to detect flaws in solids

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