i think raunak and prats are trying to find who caused araina's and sumo's accident....or like some body mentioned....shanky's dad told prats to leave his son alone and get married..for shanky's khushi...but then prats would have told shanky the 1 st day that she is married...so that argument does not really hold ground....
so most plausible raunak and prats are doing some jassosgiri which is related to araina....