Final answer:
The open irrigation technique of an indwelling urinary catheter requires instilling 100 mL of irrigation fluid using a 30 mL syringe.
Step-by-step explanation:
The correct answer is (c) 100; 30.
The open irrigation technique of an indwelling urinary catheter requires instilling 100 mL of irrigation fluid using a 30 mL syringe. This technique involves flushing the catheter with the specified amount of fluid to maintain its patency and prevent blockage.