Interest u/s 234 b and c

I have filed one return of my Client, he has u/s 44AD of Rs. 420000 and other interest income of Rs. 63471, and pay interest u/s 234A/B/C accordingly in proportionately but received CPC order for demanding interest u/s 234 B and C on whole tax, if i am correct then how to dealt with this CPC order if proportionately, then how to dealt with CPC order showing Demand of Rs. xyz. for wrong calcuation of interest