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: When you classify gallstones by what they are made of, the three buckets are cholesterol-rich, pigment-rich, and a blended mixed category.
Step 2: Most stones removed in practice do not fall cleanly into the pure groups. They are blended, holding cholesterol together with calcium phosphate, carbonate, and palmitate plus some protein, which is exactly the mixed type.
Step 3: Because of this layered composition the mixed stones tend to be many in number and show flat facets, and they dominate the case mix (about 90 percent or the leading mixed-cholesterol group in series).
Step 4: A pure cholesterol stone or a pure pigment stone is comparatively rare, and calcium bilirubinate describes pigment chemistry rather than a frequency category. So the most common type overall is mixed.
\[\boxed{\text{Mixed stones}}\]