Priya's father was 38 years of age when she was born. Her mother was 36 when her brother 4 years younger to her was born. How many years is her mother younger than her father?

Correct option is C

As per the question,
Let the age of the Priya is x when her father age is 38.
Her brother is 4 year younger to her so her age when her brother was born is x+4 years and her father age is 38+4=42 years. Her mother age was 36 years when her brother was born,
So the difference between her father and her mother age = 42- 36 = 6 years