The phenomenon of Midnight Sun is caused by the

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Q: 16 (IES/2001)
The phenomenon of “Midnight Sun” is caused by the

question_subject: 

Geography

question_exam: 

IES

stats: 

0,73,39,73,12,20,7

keywords: 

{'midnight sun': [2, 0, 1, 0], 'sun spots': [0, 0, 1, 0], 'inclination': [1, 0, 0, 0], 'earth': [0, 1, 1, 1], 'phenomenon': [3, 4, 7, 15], 'nuclear explosions': [0, 0, 1, 0], 'rotation': [1, 0, 0, 2], 'axis': [0, 0, 0, 1]}