Given below are two statements: one is labelled as Assertion (A) and the other is labelled as Reason (R).
\[
\text{Assertion (A): Prehistoric Paintings, Ajanta Painting and Medieval Temple Painting can be called as murals.}
\]
\[
\text{Reason (R): Pre-historic painting painted directly on wall, while Ajanta and medieval temple murals painted on a ground-background.}
\]
In the light of the above statements, choose the most appropriate answer from the options given below: