Which of the following is not a rational number?

If tanalpha=sqrt(a) , where a is a rational number whch is not a perfect square, then which of the following is a rational number?

If tanalpha=sqrt(a) , where a is a rational number whch is not a perfect square, then which of the following is a rational number?

Which one of the following is a rational number?

Which one of the following is not a rational number ?

Which one of the following is a rational number?

If tan alpha=sqrt(a) where a is not a perfect square then which of the following is a rational number

If tanalpha=sqrta where a is not a perfect square then which of the following is a rational number

Choose the correct alternative answer for each of the following questions: Which of the following is a rational number ?