Concept:
The term Avant-garde (French for “advance guard” or “vanguard”) refers to artists and movements that introduce innovative, experimental, and unconventional ideas in art, culture, and politics. Avant-garde artists often challenge established traditions and seek new forms of expression.
Rather than accepting existing aesthetic or political norms, avant-garde movements typically question, reject, or transform them.
Step 1: Examine Assertion (A).
The assertion correctly describes the meaning of Avant-garde as experimental and innovative in art, culture, and politics.
\[
\boxed{\text{Assertion (A) is Correct}}
\]
Step 2: Examine Reason (R).
The Reason states that avant-garde art accepts existing norms of aesthetics or political theories.
This is incorrect because avant-garde art is characterized by its tendency to challenge and break away from existing norms.
\[
\boxed{\text{Reason (R) is Incorrect}}
\]
Step 3: Choose the correct option.
Since Assertion (A) is true but Reason (R) is false,
\[
\boxed{\text{(C) (A) is correct but (R) is not correct.}}
\]