Correct Answer - a
Let the one month salary of Mr Sumanth be Rs x.
According to the problem
`(2x)/(5) + (x)/(4) + 2000 + 5000 = x` ,brgt `(8x + 5x)/(20) + 7000 = x`
`(13x)/(20) - x = -7000`
`rArr (13x - 20x)/(20) = - 7000`
`rArr (-7x)/(20) = -7000`
`(x)/(20) = 1000`
`x = 20,000`
Hence, the correct option is (a)