Maths-
General
Easy
Question
Statement I :
is one - one
Statement II :
are two functions such that 

Staatement III : 
Which of the above statement/s is/are true.
- only III
- both I & III
- both I & II
- I, II, III
Hint:
As we know that if
is one-one and
are two functions such that 
.
The correct answer is: both I & II
Both I and II are correct statement.
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