Which of the following expressions is a correct rationalised form of ?

MATHEMATICS · Single correct · CBSE · Mathematics · Number Systems · Number Systems

Problem

Which of the following expressions is a correct rationalised form of

\dfrac{4}{\sqrt{13}}

? (a)

\dfrac{4}{13}

(b)

\dfrac{4\sqrt{13}}{169}

(c)

\dfrac{4\sqrt{13}}{13}

(d)

\dfrac{13\sqrt{13}}{4}