Question

Gall bladder is absent in
(A) Elephant
(B) Horse
(C) Chicken
(D) Rhinoceros
Choose the correct answer from the options given below:

• A. (B), (C) and (D) only.
• B. (A), (B) and (D) only.
• C. (A), (B), (C) and (D).
• D. (A), (C) and (D) only.

Hint:

Ruminants (cattle/sheep) and carnivores (dogs/cats) have gallbladders, whereas hindgut fermenters and continuous grazers like horses, elephants, rhinoceroses, and rats lack a gallbladder.

Answer 1

The Correct Option is B

Step 1: Understanding the Concept:
The gallbladder is a small organ that stores and concentrates bile produced by the liver.
While present in most vertebrates, it is absent in several mammalian species, typically those that graze continuously and do not require large, concentrated releases of bile to digest high-fat meals.
Detailed Explanation:
Let us analyze the presence of a gallbladder in the listed animals:
- (A) Elephant: Naturally lacks a gallbladder.
- (B) Horse: Equines lack a gallbladder. Bile flows continuously from their liver directly into the duodenum.
- (C) Chicken: Possesses a well-developed, functional gallbladder located on the right lobe of the liver. Thus, (C) is incorrect.
- (D) Rhinoceros: Lacks a gallbladder.
Therefore, the gallbladder is absent in Elephants (A), Horses (B), and Rhinoceroses (D).

Step 2: Final Answer:
The correct combination is (A), (B) and (D) only, which corresponds to Option (B).