A blank is a surgical procedure done to remove

the gallbladder.
O colectomy
O colitis
colon resection
cholecystectomy

cholecystectomy

The surgical procedure done to remove the gallbladder is called a cholecystectomy.

The correct answer is cholecystectomy. This surgical procedure is performed to remove the gallbladder. To arrive at this answer, we can analyze the options given and understand their meanings:

1. O colectomy: Colectomy is a surgical procedure to remove all or part of the colon. It is not related to the removal of the gallbladder.

2. O colitis: Colitis is inflammation of the colon, which can be caused by various factors. It does not involve the removal of the gallbladder.

3. Colon resection: Colon resection is a surgical procedure to remove a portion of the colon. Similar to colectomy, it is not related to the removal of the gallbladder.

4. Cholecystectomy: Cholecystectomy is the surgical removal of the gallbladder. This procedure is commonly performed to treat gallbladder diseases, such as gallstones or inflammation.

Therefore, based on the given options, the correct answer is cholecystectomy.