Read the following information carefully and answer the question given below.
Eight persons— Arun, Renu, Keerthi, Balaji, Abarna, Senthil, Ajitha and Rajesh sit in a row having chairs numbered one to eight in ascending order from left to right. They all are facing north direction.

Keerthi sits on the chair numbered six. There are exactly two persons between Keerthi and Arun. Renu and Rajesh always sit adjacent to each other. Ajitha sits adjacent to neither Arun nor Keerthi. Abarna never sits on a chair having an odd number on it. Neither Renu nor Rajesh sits on chair numbered four. There is only one person between Senthil and Renu. Abarna sits on the right (not an immediate right) of Balaji, and Balaji never sits adjacent to Senthil. How many persons sit between Renu and Arun?