Square root of 2 is an example of an irrational number.
What are irrational numbers?
An irrational number is a number that cannot be expressed as a simple fraction or ratio of two integers. The square root of 2 is irrational because it cannot be written as a fraction of two integers. When you calculate the square root of 2, it is an infinite, non-repeating decimal with no pattern.
Whereas,
A. Square root of 4 is 2, which is a rational number.
B. 3/4 is a fraction and hence a rational number.
C. 74/99 is also a fraction and therefore a rational number.
So, among the options, only the square root of 2 (option D) is an example of an irrational number.
Complete question
Which of the following is an example of an irrational number? A. Squar root of 4 B. 3/4 C. 74/99 D. Square root of 2