JEE Main 2021 Physics question

The expected graphical representation of the variation of angle of deviation '' with angle of incidence 'i' in a prism is :

• (A)curve rising then falling, concave downCorrect
• (B)curve falling then rising, concave up
• (C)curve rising from origin, concave up, approaching asymptote
• (D)curve falling from a point, concave down, approaching asymptote