Concept:
Cost concepts in farm management include \(A_1\), \(A_2\), \(B_1\), \(B_2\), \(C_1\), \(C_2\), etc. These are used to calculate cost of cultivation.
Step 1: Check Assertion (A).
Cost \(A_1\) includes several actual paid-out costs such as hired labour, seed, fertilizer, manure, plant protection, irrigation, depreciation, land revenue, interest on working capital, and other expenses.
\[
A \text{ is correct}
\]
Step 2: Check Reason (R).
The reason says that it is cost \(A_2\) plus imputed rental value of own land and imputed interest on owned fixed capital.
This description does not represent cost \(A_1\). It represents a higher cost concept related to \(B\)-type costs.
\[
R \text{ is not correct}
\]
Step 3: Final conclusion.
Assertion is correct but Reason is incorrect.
\[
\therefore \text{Correct Answer is (C)}
\]