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: {\color{red}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: {\color{red}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: {\color{red}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).