The coronoid process is found on the ulna.
The coronoid process is a triangular eminence projecting forward from the upper and front part of the ulna. It forms the lower part of the trochlear notch, which articulates with the humerus at the elbow joint. This structure plays a crucial role in the stability and movement of the elbow.
Here are the options provided:
- a) Radius: The radius is one of the two bones in the forearm, but it does not have a coronoid process.
- b) Tibia: The tibia is a bone in the lower leg and is not related to the coronoid process.
- c) Ulna: The ulna is the correct bone that features the coronoid process.
- d) Humerus: The humerus is the bone in the upper arm and does not have a coronoid process.
Therefore, the correct answer is c) Ulna.