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
[{'content': 'Transthoracic compliance formula \nSelect and explain. \nA. C = Vt x RR /PEEP, B. C= V/Alv p - atmospheric pressure, C. C = Vt/Pplt - PEEP, D. C = Vt/Pk - Pplt', 'role': 'user'}, {'content': 'Answer: B \nExplanation: Transthoracic pressure Transthoracic compliance : Alveolar pressure - Atmospheric pressure', 'role': 'assistant'}]