Final answer:
The condition in horses where the cannon bones are set outwardly more than the knees is known as Bench knees. It is considered a conformation fault and can affect the horse's leg stress and injury susceptibility.
Step-by-step explanation:
The term used to describe a condition in horses where the cannon bones appear to be further apart than the knees when viewed from the front is A. Bench knees. This conformation fault occurs when the cannon bones are set to the outside of the knee joint, making the legs appear 'benched' or offset when viewed head-on. This can lead to uneven stress on the legs and may predispose the horse to certain types of injuries.