How many children are there in the class ?

I. Boys and girls are in the ratio of 8 : 5 respectively and number of girls is less than that of boys by 24.

II. Number of girls in the class is 40

if the data in statement I alone is sufficient to answer the question, while the data in statement II alone is not sufficient to answer the question

if the data in statement II alone is sufficient to answer the question, while the data in statement I alone is not sufficient to answer the question

if the data either in statement I alone or in statement II alone is sufficient to answer the question.

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

if the data in both the statements I and II together are necessary to answer the question.