JEE Main 2020 Physics question

Two isolated conducting spheres and of radius and have 12 C and –3 C charges, respectively, and are at a large distance from each other. They are now connected by a conducting wire. A long time after this is done the charges on and are respectively.

• (A)6 C and 3 CCorrect
• (B)4.5 C on both
• (C)3 C and 6 C
• (D)+4.5 C and –4.5 C