Question

Most common type of gallstone is-

• A. Mixed stones
• B. Pure cholesterol stones
• C. Pigment stones
• D. Calcium bilirubinate

Hint:

Think about which stone type blends cholesterol with calcium salts and is usually multiple and faceted.

Answer 1

The Correct Option is A

Step 1: Gallstones are broadly grouped into cholesterol stones, pigment (bilirubin) stones, and mixed stones, which contain both cholesterol and calcium salts.
Step 2: Mixed stones are the most common variety. They make up the large majority of stones (commonly quoted as around 90 percent of cases or the predominant mixed-cholesterol type) and typically contain cholesterol along with calcium salts of phosphate, carbonate, and palmitate, plus proteins.
Step 3: These stones are usually multiple and have faceted surfaces because they grind against one another in the gallbladder.
Step 4: Pure cholesterol stones and pure pigment stones are far less frequent, and calcium bilirubinate is the chemical seen mainly in pigment stones, so none of these is the single most common overall type. The correct answer is mixed stones.