Concept:
This question matches famous philosophical statements with their thinkers.
Step 1: Match statement A.
The statement:
\[
\text{Real is rational and rational is real}
\]
is associated with Hegel.
So:
\[
A \rightarrow II
\]
Step 2: Match statement B.
Descartes believed that the idea of God is an innate idea.
So:
\[
B \rightarrow I
\]
Step 3: Match statement C.
The statement:
\[
\text{Existence precedes essence}
\]
is associated with Sartre's existentialism.
So:
\[
C \rightarrow IV
\]
Step 4: Match statement D.
The statement:
\[
\text{Truth is subjective}
\]
is associated with Kierkegaard.
So:
\[
D \rightarrow III
\]
Step 5: Final matching.
The correct matching is:
\[
A-II,\ B-I,\ C-IV,\ D-III
\]
Hence:
\[
\boxed{\text{(D)}}
\]