The areal velocity of a planet is the rate at which its radius vector sweeps out area. It is given by: A=‌
1
2
r2ω where r is the distance from the planet to the sun and ω is its angular velocity. The angular momentum of the planet is given by: L=Iω=Mr2ω where I is the moment of inertia of the planet. Substituting the expression for ω from the areal velocity equation, we get: L=Mr2(‌
2A
r2
)=2MA Therefore, the angular momentum of the planet is 2MA. So the answer is Option C.