Depletion of ozone layer causes
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Which of the following was India's first interplanetary mission?
Which of the following device is used to measure humidity?
What is the unit of relative density?
Sextant is an instrument used in which of the following ?
Convex and concave mirrors are examples of?
Which of the following countries launched the World's most powerful GEO Spy Satellite - the 'Gaofen 4'?
In IT the technique that is used to increase the bandwidth is