How to invest 2 lacs in one shot for next 5 yrs , so that returns are non-taxable ?

Hi,

I have some amount which I want to invest in single shot. What is the best savings scheme to invest?

Description

1. Amount planning to be invested 2,00,000 (One time premium).

2. Returns should be non-taxable

3. I am fine with 5 years of lock-in period.

Please do let me know if you have a better suggestion for me.

Thanks,

Dinesh