A ________________ is known by different names in different parts of the world. It is called a ‘hurricane’ in North America.
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Azadirachta indica is the botanical name of which of the following?
Which of the following is the most abundant metal on Earth's crust?
In 2004, NASA launched the Messenger Spacecraft to study ___.
Malachite is an ore/mineral of
Which is the highest quality of hard coal?
An _______________ is a sudden shaking or trembling of the earth.
Which of the following fuels causes minimum environmental pollution?