Select the odd word/letters/number/number pair from the given alternatives.
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Which of the following was invented by Sir Humphry Davy?
Who invented the mobile phone?
Who has won the most number of Gold Medals in Olympics?
The Nobel Prize in Literature 2016 was awarded to?
If a+1a=1, then the value of a2-a+1a2+a+1 is a≠0
Name the Commission that came to India in 1928 to reform India's constitutional system.
At Rio Olympics, what was the final position of Dipa Karmakar in her category?