How many movies have A V Seshagiri Rao and T. N. Balakrishna collaborated on?

They have worked on 4 movies together! Their first movie together was Sampatthige Savaal (1974) while their highest rated movie together was Bahaddur Gandu (1976). They have not worked together since Vasantha Lakshmi (1978). They are most known for their drama films together.