JEE Main 2023 Physics question

A thin prism with an angle 6° and made of glass of refractive index 1.54 is combined with another prism made from glass of refractive index 1.72 to produce dispersion without average deviation. The angle of prism is

• (A)6°
• (B)1.3°
• (C)4.5°Correct
• (D)7.8°