which number produces an irrational number when added by 3/4

The number is π.
The correct option is (D).
What irrational number?
Any real number that cannot be expressed as the quotient of two integers—that is, p/q, where p and q are both integers
As, we know π is irrational number and if we add any irrational number then it is also irrational.
So, π + 3/4 = irrational as π is irrational.
learn more about irrational number here:
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