Connect the statements that mean the same

Verbal		Answer	Symbolic
A	The sum of a complex number and its conjugate is purely imaginery.	1 2 3 4	1	z+ _ z   Î R
B	The product of a a complex number and its conjugate is real.	1 2 3 4	2	z     = z
C	The conjugate of the conjugate of a complex number is the original number.	1 2 3 4	3	Re(z+ _ z   ) = 0
D	The sum of a complex number and its conjugate is purely real.	1 2 3 4	4	Im(z _ z   ) = 0