After three years, Arun would be twice as old as his brother was four years ago. His sister’s present age is half of his brother’s age that would be 12 years from now. If the sum of present ages of all the
three is twice as much as Arun’s age one year from now, his brother’s age 2 years ago would have been
Option
(a) 47 years
(b) 21 years
(c) 30 years
(d) 28 years