@susanitaq8 It's a safe bet and the returns are guaranteed with a very low level of risk. Mutual funds or shares give higher 'returns', but they are not guaranteed, carry much higher risk and are also taxable.
It all depends on your risk appetite and portfolio setup.
In 2012/13 FD rate was 10%, compounded quarterly and was a better investment than debt funds, especially for NRIs who don't pay tax on FDs.