Let check amount be 100x+y

Cash given out = 100y+x

So, according to the given condition,

100y+x-50=3*(100x+y)

97y = 50+299x

Now, as x and y have to be integers

So, 50+299x has to be divisible by 97

So, 50+291x+8x has to be divisible by 97

So, 50+8x has to be divisible by 97

This happens when x = 18

Hence, option 4