A) sublimation of vapour in comet
B) vaporisation of water in comet
C) vaporisation of heat in comet
D) cooling of water in the comet
Correct Answer: B
Solution :
When the comet approaches the sun, the substance like water etc in the comet get vaporised due to heat of the sun and radiation of pressure vapour away from the sun. So the tail of the comet is formed.
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