Final answer:
Subjective tinnitus is the most common type and it is only perceived by the person experiencing it. Objective tinnitus can be heard by a healthcare professional during an examination.
Step-by-step explanation:
Tinnitus can be classified into two types: subjective tinnitus and objective tinnitus. Subjective tinnitus is the most common type and it is only perceived by the person experiencing it. It is often caused by damage to the inner ear or the auditory nerve. Objective tinnitus, on the other hand, can be heard by a healthcare professional during an examination and is typically caused by a physical sound source, such as blood flow abnormalities or muscle contractions in the ear.
So the answer to your question is a) Subjective.