Concept:
India follows the parliamentary system of government inspired by the British model.
Step 1:
The Constitution of India indeed establishes a parliamentary form of government.
\[
A \text{ is correct}
\]
Step 2:
In this system, the executive is responsible to the legislature.
Step 3:
The parliamentary system is commonly called cabinet government or Westminster model.
\[
R \text{ is correct}
\]
Step 4:
The reason gives another name for parliamentary government but does not explain why India adopted it.
Step 5:
Hence, both Assertion and Reason are correct, but Reason is not the correct explanation of Assertion.
\[
\boxed{\text{(2) Both (A) and (R) are correct but (R) is not the correct explanation of (A)}}
\]