$\"\"$

In the fraction $\"\"$ ,the denominator in factor of the form $\"\"$ , the partial fraction decomposition must include following sum of m fractions. $\"\"$ .

The rational expression is $\"\"$ .

In the above expression denominator is $\"\"$ , so m = 3.

The decomposition of expression $\"\"$ is $\"\"$ . $\"\"$

The rational expression, $\"\"$ match with label (a).