When Rahul born, his father was 32 years older than his brother and his mother was 25 years older than his sister. If Rahul?s brother is 6 years older than him and his mother is 3 years younger than his father, how old was Rahul?s sister when he was born?

• A. 10 years     
• B. 7 years      
• C. 14 years     
• D. 20 years