Find the number of square?

In each of the following questions, four numbers are given out of which three are like in some manner while one is different. Choose the one which is different from the rest three?

The question below is based on the given diagram. The diagram shows three figures each representing scientists, Government employees and employees of Company X.

Which of the following represents all such Scientists who are Government employees but are not employed in Company X?

If Ram runs less fast than Shyam and Shyam runs as fast as Lal but less fast than Tom. Who runs fastest? 

If CAT is coded as 3120, what code number can be given to NAVIN? 

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In each question below is given a statement followed by two courses of action numbered I and II. You have to assume everything in the statement to be true and on the basis of the information given in the statement, decide which of the suggested courses of action logically follow(s) for pursuing.
Statement: Severe drought is reported to have set in several parts of the country.
Courses of Action:
I. Government should immediately make arrangement for providing financial assistance to those affected.
II. Food, water and fodder should immediately be sent to all these areas to save the people and cattle.