Which of the following contributes the maximum earning in Indian Railways?
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Heavy water is mostly used in which of the following?
The outermost layer of sun is called
Which of the following countries launched the World's most powerful GEO Spy Satellite - the 'Gaofen 4'?
Which of the following is called 'The queen of Arabian sea'?
Indus Valley Civilization was a __________ age civilization.
"Malgudi Days" was written by _____.
Who discovered Photon?