When ACP Malti Vaidya is sitting in the hotel, she's shown first sucking on a long cigarette (unlit), then in the next shot, is lighting the same cigarette with a noticeably shorter and already smoked cigarette.
Karan's beard appears and disappears throughout the movie.
Saif's car shows a yellow license plate which means it's a commercial vehicle, which can be driven by a driver holding a commercial license only.