For OBCs, at least 18 marks should be there as aggregate and 45 in PCM What is pcm in this context
Kavitha, PCM here refers to the subjects Physics, Chemistry and Mathematics. Hence the clause means that you should score an aggregate of at least 18 marks when all the subjects are considered. But when considering only Physics, Chemistry and Mathematics, you should get an aggregate of at least 45 marks. Hope it helps.