@thearsenal
well, i know there is no provision for RTR(C) in undertaking form, but see, the part-1 of that form gets totally eliminated since we hold the previous indian RTR (C), so we are left with only part-2 of that particular form,
so we can fill out the part-2 of undertaking while put a cross on RTR(P) and will write RTR(C) and the number instead.
i am suggesting this because one of my friend did the same just before couple of months and he is through.