Who invented the hot air balloon?
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In the following question, out of the four alternatives, select the alternative which is the best substitute of the phrase.
work extremely hard or incessantly.
Sun appears red in colour at sunrise and sunset due to
WIMAX stands for
Which of the following planet is also known as 'Earth's twin'?
If a body takes 't' seconds to go once round the circular path of radius 'r', the velocity 'v' is given by
Kanha Tiger Reserve is in which state?
What is the capital of Ireland?