Let x be the age of ishaan so the age of ben will be 12+x. the equation will become x=x+12 Going 3 years back, the age of ishaan was x-3 so that of ben would be x+12-3 before 3 years. at that time the age of ben was 4 times the age of ishaan. it means x+12-3(the age of ben)=4(x-3(the age of ishaan)) solving this equation, we get the answer x=7. this is the age of ishaan in the present.
In mathematics, the statement if a, then b, says that if a is true, then be is true. If you think about it, this makes sense too. That means that the answer is C., because of the definition of the statement.
