Which language is best for Unity 3d game engine?

Answer 1

C#

Edit:
UnityScript / JavaScript will not be supported anymore in the future. So it is better for you to use C# for Unity

Answer 2

I don't think there are any highly compressed version of it

Answer 3

thanks man....can u tell me if there is a HIGHLY COMPRESSED version of this....i mean it is asking 1gb download