Concept:
This question matches important experiments and physical laws with their correct significance.
Step 1: Michelson-Morley experiment.
Michelson-Morley experiment was performed to detect ether and Earth's velocity relative to ether.
\[
A\rightarrow IV
\]
Step 2: Raman effect.
Raman effect is inelastic scattering of light by a medium.
\[
B\rightarrow I
\]
Step 3: Planck radiation law.
Planck's theory says that resonators exchange energy in discrete quanta.
\[
C\rightarrow III
\]
Step 4: Estimation of temperature of Sun.
Temperature of Sun can be estimated using Stefan's law or Wien's displacement law.
\[
D\rightarrow II
\]
Therefore:
\[
A-IV,\ B-I,\ C-III,\ D-II
\]
\[
\therefore \text{Correct Answer is (A)}
\]