Step 1: Understanding the feasible region in Linear Programming.
In a Linear Programming Problem (LPP), the feasible region consists of all possible values that satisfy the given constraints.
Step 2: Evaluating Assertion (A).
The optimal solution of an LPP is always found at one or more corner points of the feasible region, not at every point. Hence, Assertion (A) is false.
Step 3: Evaluating Reason (R).
The Fundamental Theorem of Linear Programming states that the optimal solution lies at a corner point of the feasible region. This makes Reason (R) true.
Since Assertion (A) is false and Reason (R) is true, the correct answer is (D).