What is the total enrolment of students in the class?
(I) The number of boys and girls in the class are in the ratio 1 : 4.
(II) The total enrolment of students is a two digit perfect square.

if the statement (I) alone is sufficient to answer the question, but (II) does not answer the question.

if the statement (II) alone is sufficient to answer the question but (I) does not answer the question.

if both the statements (I) and (II) are sufficient to answer the question but neither statement alone is sufficient.

if both the statements (I) and (II) together are not sufficient to answer the question and additional data is required.