The thermosphere extends from an altitude of ________ to the base of ________ at ________...? Mcqs

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The thermosphere extends from an altitude of ________ to the base of ________ at ________...?

(A) 75 km, Mesosphere, 670 km
(B) 80 km, Ionosphere, 680 km

(C) 85 km, Exosphere, 690 km
(D) 90 km, Ozone Layer , 690 km

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DNA is _____________...?

(A) Acetic Acid
(B) A class of nucleic acids

(C) Citric Acid
(D) None of these

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