Given that, Vatshala's age = 5 years Tushar's age = 3(Vatshala's age) + 5 Tushar's age = 3 × 5 + 5 = 15 + 5 Tushar's age = 20 years. Khushi is two years younger to Tushar. Khushi's age = (Tushar's age) - 2 Khushi's age = 20 - 2 = 18 years. Also, Khushi is three years older than Pihoo. Khushi's age = (Pihoo's age) + 3 Pihoo's age = Khushi's age - 3 Pihoo's age = 18 - 3 Pihoo's age = 15 years. Hence, the correct answer is "15 years".