RRB NTPC Mains or Stage 2 Model Paper 3 with solutions

Four aeroplanes of Air force viz, A, B, C, D star ted for ademonstrat ion flight to was east. After flying 50 km planes A and D fly towards right , planes B and C flew towards left . After 50 km, planes B and C flew towards their left, planes A and D flew towards their left . In which directions the aeroplanes A, B, D, C respectively fly now?