This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Anesthesia Machine, Subject name: Anaesthesia
Arrange following pas of Anesthesia machine according increasing pressure system wise i) Vaporize mounting devices ii) Hanger yoke assembly iii) Flow indicators iv) Pipe line indicator 
Select and explain. 
A. (iii), (i), (iv), (ii), B. (i), (iv), (iii), (ii), C. (ii), (i), (iii), (iv), D. (iii), (iv), (ii), (i)
A: (iii), (i), (iv), (ii)
Answer: A: (iii), (i), (iv), (ii) 
Explanation: Anesthesia machine according increasing pressure system iii) Flow indicators i) Vaporize mounting devices iv) Pipe line indicator ii) Hanger yoke assembly