The “audible” is also referred as “perceptible” because any perception from senses can be perceptible. In the above case, the nurse has perception of sound from physical examination of patient.
The other words such as observable, or spasmodic are not the meaningful terms to describe “perceptible or audible” in the above case.
Thus, the options (a), (b) and (c) are incorrect.
The “audible” is also referred as “perceptible” because any perception from senses can be perceptible. In the above case, the nurse has perception of sound from physical examination of patient.
Therefore, the correct option is – d. Perceptible