The interest rate of Bank of India is based upon RBLR i.e. Repo based Lending Rate. Spread of 1 or 2% is added by the bank to finalise the landing rate.
External benchmark rates such as the Marginal Cost of Funds Based Lending Rate (MCLR) or the Repo Rate changes can affect your amount.
The total repayment period can affect the interest rate of your education loan. Taking loan for higher amount can also impact interest rates.