Direction: In the following question, a given questions is followed by information in three statements. You have to decide the data in which statement (s) is sufficient to answer the question and mark your answer accordingly.

How many students are there between R and A?

I. R is 7th from the left end. A is 17th from the right end.

II. R is 6 places away from V, who is 20th from the left end.

III. There are total 40 students in the class.