The Great Smog of 1952 was a severe air-pollution event which affected _______.
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Which of the following is the cleanest source of energy?
Which out of the following is not a launch vehicle of India for placing satellites in the orbit?
The force of friction between two surfaces will increase if:
The given symbol stands for a/an ___ in an electric circuit.
__________ approves constitutional amendments.
Lungs are the primary organs of _________.
How many groups and periods are present in the Modern Periodic Table?