Concept:These two words look similar but have distinct meanings in English vocabulary.
Explanation:Incredible refers to something that is very difficult to believe.
For example, an incredible story means a story that seems almost unbelievable.
Incredulous refers to a person who is not willing to believe something.
It describes a skeptical attitude or disbelief.
So,
Incredible describes the object or situation, while
Incredulous describes the person feeling doubt.
Now check the options carefully.
Option B states exactly this correct pair of meanings.
The other options either reverse the meanings or give completely wrong definitions.
Answer:Option B is correct:
Incredible means difficult to believe, and
Incredulous means not willing to believe something.