What does SEG directive do in 8086?

Question

SEG A :

Assigns the content held in segment register corresponding to the segment in which A resides to the operand.

I guess that means

Answer 1

It copies the content of AX + DX address (which is A) to AX.

MOV AX, LEA A ; Copy A offset to AX
MOV DX, SEG A ; Copy A segment to DX
MOV AX, [AX + DX] ; Copy A to AX