In this problem, a guy is moving along this circular track at constant speed. When he is at B, the centre of motion is 'downwards', isn't it? So there must be centripetal force on the cyclist that is pulling him downwards towards that centre 'O'. But, all the solutions of this problem say that the centripetal force on cyclist is 'upwards'.
I'm confused because, my current notion says centripetal force acts towards the centre and hence it should be acting downwards when cyclist is at B. Centrifugal force is the one that acts outwards, but it's from the rotating frame, and in this situation I'm sitting in inertial frame, observing this cyclist.
All in all, in which direction is $mv^2/r$ acting? Downwards (red arrow) or Upwards (green arrow)? If it is green arrow then why is this centripetal force acting 'away' from centre?