A man standing at top of a tower has two spheres A and B. he drops sphere A downwards and throws sphere B horizontally at the same time. Which of the following is correct?

A man standing at top of a tower has two spheres A and B. he drops sphere A downwards and throws sphere B horizontally at the same time. Which of the following is correct?

A will reach the ground first

B will reach the ground second

Both the spheres will reach the ground simultaneously         

The question is incomplete because the masses of the spheres are not given