What is the difference between ages of Mother and Son A?
Statements:
1. A is 10 years older than his sister B.
2. B is 30 years younger than her mother C.1
2 alone is sufficient while 1 alone is not sufficient to answer the given question
2
Both 1 and 2 are sufficient to answer the given question.
3
1 alone is sufficient while 2 alone is not sufficient to answer the given question.
4
Neither 1 nor 2 is sufficient to answer the given question.