Mark the correct pair of muscles involved in the normal breathing in humans
(a)External and internal intercostal muscles
(b)Diaphragm and abdominal muscles
(c)Diaphragm and external intercostal muscles
(d) Diaphragm and intercostal muscles
The answer is the option (d) Diaphragm and intercostal muscles
Explanation: The diaphragm and intercostal muscles are involved in the normal breathing process in humans.