The Preamble of the Indian Constitution was amended in which year?
The correct answer is B
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99 ml of mixture ‘P’ contains milk and water in the ratio of 7:4, respectively is mixed with 30 ml of mixture ‘Q’ containing mil...
If 4 kg of metal of which 1/3rd is zinc and the rest is copper, be mixed with 5kg of metal, of which 1/6 is zinc and the rest is copper, then...
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