SNAP 2021 Distribution — Previous Year Question

During their school Silver Jubilee Reunion, four alumni were discussing their starting annual salaries back in 1981. The salaries in question were rupees 40, 50, 60 and 70 thousand per year. Of course, the present MD of their private company earned the most. Arvind earned more than Biswajit, and the doctor earned more than Dhruv the engineer. Chinmay could not recall exactly how his own starting salary compared to Biswajit's. The lawyer did not start on 50,000, nor did Dhruv.