Who is doing what ？Computer Science Level pending
4 people A,B,C,D in one room.
They are listening the pop songs .
one is reading
one is cutting nails
one is lying on the bed
one is sketching
- A is not cutting nails or reading
2.B is not lying on the bed or cutting nails
3.C is not reading or cutting nails
4.D is not reading or lying on the bed