Who invented the contact lens?
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Where was paper invented?
Ravuri Bharadhwaja won Jnanpith Award for work in which language?
Battle of Plassey was fought in ______.
Which country did India lose to in the semi finals of the Men's Cricket World Cup 2015?
In May 2017, the Base year of All India Index of Industrial Production (IIP) has been revised to ______.
If 4x2 - 12x + k is a perfect square, then the value of k is
Molecular clocks are based on the idea that _____.