In which year was Rahul born ? I. Rahul at present is 25 years younger to his mother. II. Rahul's brother, who was born in 1964, is 35 years younger to his mother.

• If the data in statement I alone are sufficient to answer the question
• If the data in statement II alone are sufficient answer the question
• If the data either in I or II alone are sufficient to answer the question;
• If the data in both the statements together are needed.