Which of the following is a rational number A pi B 1425 C sq

Which of the following is a rational number? A. pi B. 1.425 C. squareroot 50 D. squareroot -4

a rational number can be expressed in the form of p/q where q is not equal to 0

pi is irrational number

1.425 is rational number , 1.425 = 1425/1000

sqrt(50) is irrational number

sqrt(-4) is complex number

so answer is \'B\'