What are the Difference between oils and fats

Question

$\begin{array}{1 1} \text{(a) Fats are soluble and oils are insoluble in water.} \\ \text{(b) Fats are solid and oils are liquid at room temperature} \\ \text{(c) Oils are Esters of saturated fatty acids and Fats are Esters of unsaturated fatty acids} \\ \text{(d) None of the above}\end{array}$