JEE Main Physics question

A ring of diameter 0.4 m and of mass 10 kg is rotating about its axis at the rate of 1200 rpm. The angular momentum of the ring is

• (A)60.28 kg·m²s⁻¹
• (B)55.26 kg·m²s⁻¹
• (C)40.28 kg·m²s⁻¹
• (D)50.26 kg·m²s⁻¹Correct