GATE Civil Engineering (CE) 2019 Shift 2 Solved Paper

Mohan, the manager, wants his four workers to work in pairs. No paper should work for more than 5 hours. Ram and Johan have worked together for 5 hours. Krishna and Amir have worked as a team for 2 hours. Krishan does not want to work with Ram whom should mohan allot to work with Johan, if we wants all the workers to continue working?