Correct Answer:
A. Wall painting
A synonym is a word or phrase that means exactly or nearly the same as another word or phrase in the same language. The word "Mural" refers to a large picture painted directly on a wall or ceiling, often depicting a specific scene or theme. Therefore, "Wall painting" is the most accurate and direct synonym, as it precisely describes the nature and location of a mural.
The other options are incorrect because they have entirely different meanings. "Lack of clarity" refers to vagueness or ambiguity. "Range" refers to the extent or scope of something, or a variety. "Scope" refers to the extent of the area or subject matter that something deals with or to which it is relevant. These words are not related in meaning to "Mural."