In the following question, a question is followed by information given in three statements. You have to study the question along with the statements and decide, the information given in which of the statement(s) is necessary to answer the question.

What are the marks obtained by Arnab in History?

I. The average marks obtained by Arnab in History, Geography and Civics are 65.

II. Marks obtained by Arnab in Geography is 6 more than that obtained in History.

III. Marks obtained in Geography is as much more than that in Civics as the marks obtained in Civics is more than that in History.