What is the recommended treatment for urethral obstruction in dogs?

The use of antibiotics is recommended to control local and urinary infection.
The patient should be closely monitored during the first few days of the postoperative period.
The patient should be left without a urinary catheter to avoid injury to the operated area.
Urethrostomy is the technique of choice for permanent obstruction.
a) Only I and II are correct.
b) Only II and IV are correct.
c) Only I, III, and IV are correct.
d) Only II, III, and IV are correct.