In biliary stone extraction during ERCP, which sequence describes standard steps?

In biliary stone extraction during ERCP, which sequence describes standard steps?

• A. Endoscope removal of stents prior to cannulation.
• B. Achieve biliary cannulation, perform cholangiography, extract stones with balloon or basket, use lithotripsy for large stones, place biliary stent if obstruction persists.
• C. Place a biliary stent before attempting stone extraction.
• D. Directly perform stone extraction without cannulation.

Answer: (B)