Answer is (b) p1, it is the code for a normal healthy patient.
Physical status modifiers are abbreviated as P modifiers, these are unique to anaesthesia coding. These modifiers were developed by American Society of Anaesthesiologists (ASA) to help differentiate between the different levels of complexity in providing anaesthesia based on the patients health conditions.
Rationale:
p3 is the code for a patient with a severe systemic disease.
p2 is the code for a patient with a mild systemic disease.
p4 is the code for a patient with a severe systemic disease that is also a threat to life.