Mehta: it is in packed in an iron box with a lock which is not an openable lock. Once it is locked it has to be broken. it is one time use. Two trunks of question papers go in a sealed metal box. The vehicle with carries the strong has GPS and it is cracked in the head office of NTA. Even a small movement is recorded. if he holds it would be recorded. The vehicle contains two sets having different questions. They are put into two separate Banks in strong rooms.