What is the possible number of reflexive relations on a set of 5 elements?

$$\text{Total Reflexive Relations} = 2^{(n^2 - n)}$$

Calculation for 5 Elements

Given n = 5:

$$\text{Number of relations} = 2^{(5^2 - 5)}$$

$$\text{Number of relations} = 2^{(25 - 5)}$$

$$\text{Number of relations} = 2^{20}$$

Therefore, the correct choice is 3) 2^20.