Who invented the waterproof raincoat?
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Who discovered the colour photography?
Amir Khusrow was the disciple of whom?
What is the capital of Austria?
Canberra is capital city of which country?
The Arabic work of al-Biruni that gave an account of the subcontinent is called __________.
Who among the following has not scored even a single triple hundred in test matches?
If k is the largest possible real number such that p4+q4=(p2+kpq+q2)(p2-kpq+q2), then the value of k is