They are dropped simultaneously from a height of 20m. Which of the following is correct?

Two balls A and B are of 10kg. and 1 kg. respectively. They are dropped simultaneously from a height of 20m. Which of the following is correct?
(a) A will reach the ground first
(b) B will reach the ground first
(c) Both A and B will reach the ground at the same time
(d) None of the above