The respiratory quotient of which diet is less than unity?

The respiratory quotient $(RQ)$ of carbohydrates is:

$2(C_5H_9O_5) + 145O_2 \rightarrow 102CO_2 + 98H_2O + \text{energy}$. The Respiratory Quotient $(RQ)$ of a biomolecule used for respiration,as per the above equation,would be:

In the case of $........$,the $R.Q.$ is greater than $1$.

Which of the following respiratory materials may show the unit value of $R.Q.$?

When the respiratory substrate is ......,the volume of $CO_2$ evolved is more than the volume of $O_2$ consumed.