Concept:
When a person takes a loan from a bank or financial institution, they have to repay the principal amount along with interest. The interest charged on a loan represents the cost of borrowing money, which is known as the cost of credit.
Step 1: Understand the given situation.
Megha has taken a loan of ₹5 lakhs from a bank. The bank charges an annual interest rate of 12% on this loan.
Step 2: Interpret the meaning of the interest rate.
The interest rate determines the additional amount that Megha must pay to the bank for borrowing the money. This additional payment is the price paid for using credit.
Step 3: Identify the correct concept.
Since the interest rate represents the amount charged for borrowing money, it refers to the:
\[
Cost of Credit
\]
Therefore, the correct answer is Option (B).