Concept:
Chronological order means arranging thinkers from earlier to later.
In Buddhist philosophy, Vasubandhu, Dinnaga, Dharmakirti and Kamalasila belong to different stages of Buddhist philosophical development.
Step 1: Place Vasubandhu first.
Vasubandhu is an early and important Buddhist philosopher.
So:
\[
A = \text{Vasubandhu}
\]
Step 2: Place Dinnaga after Vasubandhu.
Dinnaga came after Vasubandhu and is famous for Buddhist logic and epistemology.
So:
\[
B = \text{Dinnaga}
\]
Step 3: Place Dharmakirti after Dinnaga.
Dharmakirti developed Buddhist logic further after Dinnaga.
So:
\[
C = \text{Dharmakirti}
\]
Step 4: Place Kamalasila last.
Kamalasila belongs to a later period.
So:
\[
D = \text{Kamalasila}
\]
Thus, the correct chronological order is:
\[
A \rightarrow B \rightarrow C \rightarrow D
\]
Hence:
\[
\boxed{\text{(A) A, B, C, D}}
\]