The rational number among all the answer choices is; Pi + √16.
A rational number by definition, is one that can be represented as the quotient a/b of two integers in which case b ≠ 0.
On this note, it follows that since the constant pi is; 22/7, the number pi + √16 can be represented as a rational number as follows;
22/7 + 4 = 50/7.
Read more on rational numbers;
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