How many boys are there in the class?
A. Theclass has total 45 children and ratio of boysto girls is 4:5.
B. Theratio of girls to boys is 4 :5 and boysare nine more than the girls.

if the data in statement B alone are sufficient to answer the question while the data in statement A alone are not sufficient to answer the question.

if the data in statement A alone are sufficient to answer the question, while the data in statement B alone not sufficient to answer the questions.

if the data either in statement A alone or in statement B alone are sufficient to answer the question.

if the data in both the statements A and together are not sufficient to answer the question.