Step 1: Recall the three cartilage types.
The body uses hyaline cartilage for smooth low friction surfaces, elastic cartilage where flexibility is needed, and fibrous cartilage where extra toughness against compression and pulling is required.
Step 2: Match each option to a cartilage type.
The larynx and epiglottis are supported mainly by elastic and hyaline cartilage for flexibility, and the pinna of the ear is classic elastic cartilage, so these three are ruled out.
Step 3: Identify the fibrous cartilage location.
The pubic symphysis, the joint between the two halves of the pelvis, needs to absorb repeated compressive stress, and that is exactly the job of dense fibrous cartilage.
Final answer: Option 3, pubic symphysis.