Which of the following device is used to measure humidity?
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Optical fibre works on which of the following principle of light?
The lowest layer of atmosphere is called _______.
Which country is the largest producer of Guava?
The unit of measurement of a word length is
What is formed when Magnesium is burnt?
Who was the first Indian to be elected as the leader of the Communist International?
Which glass is used to make spectacles?