If payment of security is paid as Rs 100 at end of year for three years, it is an example of

fixed payment investment
lump sum amount
fixed interval investment
annuity

The correct answer is D. Annuity.

An annuity is a series of equal payments made at regular intervals for a fixed period of time. In this case, the payment is Rs 100 and the interval is one year.

A lump sum amount is a single payment made at a specific time.

A fixed interval investment is an investment where the amount invested is the same at regular intervals.

A fixed payment investment is an investment where the amount paid out is the same at regular intervals.

In this case, the payment is Rs 100 and the interval is one year. Therefore, the investment is an annuity.