Answer:
Option A, fistula
Step-by-step explanation:
A fistula is an opening between two previously separate and unconnected tubes that can occur in abnormal circumstances or surgically created. The abnormal circumstances, such as a fistula between the rectum and vagina can be dangerous because it allows bacteria present in the feces to gain access to the vaginal tissues which can lead to the development of infection. Other fistulas can be surgically created like when an artery and a vein are surgically connected (arteriovenous fistula) for the sake of dialysis treatments. The treatment of fistulas is typically antibiotics, a temporary change in diet, and possibly surgery or wound care.
A lesion is any damage of wound that develops within a tissue as a result of a trauma or a disease process.
An ulcer is a pocket or a sore that develops within the lining of an organ usually caused by an infectious pathogen. Typically, ulcers are found along the gastrointestinal (GI) tract.
A hematoma is an outpouring of blood from a ruptured blood vessel that can then collect outside of the vasculature. These can range from minor bruises to major bleeds from essential tissues.
Returning back to the question at hand, a new opening between two previously-unconnected tubes is a fistula, option A.