This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: JIPMER 2018, Subject name: Physiology
Transthoracic compliance formula 
Select and explain. 
A. C = Vt x RR /PEEP, B. C= V/Alv p - atmospheric pressure, C. C = Vt/Pplt - PEEP, D. C = Vt/Pk - Pplt
B: C= V/Alv p - atmospheric pressure
Answer: B: C= V/Alv p - atmospheric pressure 
Explanation: Transthoracic pressure Transthoracic compliance : Alveolar pressure - Atmospheric pressure