A body weighing 13 kg is suspended by two strings 5 m and 12 m long, their other ends being fastened to the extremities of a rod 13 m long. If the rod be so held that the body hangs immediately below the middle point. The tensions in the strings are (1) 12 kg and 13 kg                    (2) 5 kg and 5 kg (3) 5 kg and 12 kg                      (4) 5 kg and 13 kg