Question

If two rational numbers $\frac{a}{b}and\frac{c}{d}$ are equal, then

• A.
  $ab=bc$
• B.
  $ac=bd$
• C.
  $ad=bc$
• D.
  $ab=cd$

Answer 1

The correct option is C

$ad=bc$
$\frac{a}{b}=\frac{c}{d}ad=bc$

So, option c is correct.