Treatment of tension pneumothorax is -

Ans. is 'a' i.e., Insertion of a large bore needle in the 2nd ICS in the mid clavicular line o Treatment consists of immediate decompression, initially by rapid insertion of a large-bore needle into the second intercostal space in the midcalvicular line of the affected hemithorax and then followed by insertion of a chest tube through the fifth intercostal space in the anterior axillary line.