@Ahhhmed
You should really start a new post for this as it isn't related to the original post.
If the values in A2 are 1 to 4 you can use a Choose Function
=Choose(A2, Option 1, Option 2, Option 3, Option 4)
If the values in A4 are not 1 to 4
=If(A2=Value 1, Option 1, if(A2=Value 2, Option 2, if(A2=Value 3, Option 3, Option 4)))