Correct Answer - Option 3 : 22 years
Age of Aarti = 6 years
Age of Aarti's father = 6 years + 19 years = 25 years
Age of Aarti's mother = 25 years + 6 years = 31 years
Age, at which the mother got married = 31 years - 6 years - 3 years
31 years - 9 years = 22 years.
Hence, 22 years is correct.