[Solved] What are Sun spots? [Railways 1994]

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Q.	What are Sun spots? [Railways 1994]
A.	Regions on earth without winter climate
B.	Desert areas on the sun
C.	Dark patches on the surface of the sun which are cooler areas
D.	Dark patches on the surface of the Sun resulting from a localised fall in the temperature to about 4000 K
Answer» D. Dark patches on the surface of the Sun resulting from a localised fall in the temperature to about 4000 K

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