CAT Questions

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The buying and selling of goods is called Trade. Trade is a part of business where goods and services are exchanged for mney and mainly to earn profit. Commerce is used to describe trade and all the other business activities and services which make trade possible like banking, insurance, transport and advertising.

The thermometer that is used to measure body temperature is called as Clinical or medical thermometer.

The Law of Demand tells that, if the price of a product increases then the demand will go down i.e, decreases iff all other things equal.

4 H of the A means 4 Horsemen of the Apocalypse.

It is a painting of 1887 by Viktor Vasnetsov.

"Christ the Redeemer" is located in Rio De Janeiro, Brazil. 

From the history,

The Erie Canal was completed in 1800's

The signing of the Declaration of Independence in 1776 and after that the American Revolution was started in the same 1776.

The Iroquios Confederacy was formed early when the Europeans first began comonizing, may be early in 1600's.

So, from the above data of history, Iroquois tribes formed the Iroquois Confederacy was the event that occured first among the options.