Urea is a by product of amino acid catabolism, Which occurs in the liver. The nitrogen in the  amino acid becomes converted to ammonia and this is further converted by the liver into urea

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Arvari river is a small river in the Indian state of Rajasthan. It just have 90 km of length and it also consider as the smallest river of India and flows through the Arvari District of Rajasthan

The hottest layer of the Earth is its innermost layer. The inner core Quite literally the center of the Earth, the inner core is solid and can get to estimate temperatures over 9,000 degrees Fahrenheit

During world war II, Germany was a member of the Axis powers.

Humming bird is the smallest bird and the only bird which can fly in backwards in the world.

Qatar country has decided to withdraw its membership from OPEC as of January 2019. The OPEC is The Organization of the Petroleum Exporting Countries founded in Baghdad, Iraq, with the signing of an agreement in September 1960 by five countries namely Islamic Republic of Iran, Iraq, Kuwait, Saudi Arabia and Venezuela. They were to become the Founder Members of the Organization.

Anarchy means Absence of government.