How can we find the molecular formula from the molar mass?

In order to obtain the molecular formula from the molar mass, we must first find the molar mass of the chemical compound.

First calculate the empirical formula molar mass. Now we have to divide the molar mass obtained with the empirical formula molar mass. 

A number close to a whole number is obtained. Then multiply that whole number with the subscripts of the empirical formula, the obtained formula is known as the molecular formula.

Hence option (A) is correct.