Concept:
Buddhist murals are paintings related to Buddhist themes, Jataka stories, Bodhisattvas and monastic culture.
Ajanta and Bagh are two very important sites of Buddhist mural painting.
Step 1: Check Ajanta.
Ajanta is one of the greatest Buddhist mural painting sites of India.
So:
\[
A = \text{Correct}
\]
Step 2: Check Bagh.
Bagh caves are also associated with Buddhist mural paintings.
So:
\[
D = \text{Correct}
\]
Step 3: Check Lepakshi and Hampi.
Lepakshi and Hampi are mainly associated with Hindu temple mural traditions, not Buddhist murals.
So, B and C are incorrect.
Step 4: Final conclusion.
The correct theme and place combination is:
\[
A,\ D
\]
Hence:
\[
\boxed{\text{(B) A and D only}}
\]