A relation R on the set of complex numbers defined by Z1RZ2⇔Z1-Z2Z1+Z2  is real then which of the following is not true?

Z1RZ1⇒Z1-Z1Z1+Z1=0∴  R is Reflexivebecause 0 is real.             Z1RZ2⇒Z1-Z2Z1+Z2isreal⇒-Z1-Z2Z1+Z2isreal ∴R is symmetric              Z1=a1+ib1;    Z2=a2+ib2      Z1RZ2⇒Z1-Z2Z1+Z2is realimaginary portion zero⇒a1+a2b1-b2-a1-a2b1+b2=0⇒2a1b2-2b1a2=0⇒a1b1=a2b2 so it is transitivefinally it is equivalance