Jaya, Sushama, Rama, Dilip, Sudhir and Arun are doctors working in a hospital specialising in gynaecology, neurosurgery, paediatrics, orthopaedics, anaesthesia and intensive care, not necessarily in that order. What is Rama's specialisation if the following conditions are to be met: Jaya, Arun and Sushama work together. Neurosurgeons always need the help of orthopaedic surgeons in the operation theatre. Orthopaedic surgeries cannot happen on the same days that gynaecological surgeries happen. Gynaecologists need paediatricians on standby during their operating hours. Though Sudhir and Dilip work together, neither has ever met Sushma in the hospital. All specialisations except intensive care need to work with Arun, the anaesthetist. Doctors don't work together other than as mentioned above.