JEE Advance - Mathematics (1988 - No. 10)

$$\left( {{a^2} - {b^2}} \right)left( {{{\left| {{z_1}} \right|}^2} - {{\left| {{z_2}} \right|}^2}} \right)$$

$$\left( {{a^2} + {b^2}} \right)left( {{{\left| {{z_1}} \right|}^2} - {{\left| {{z_2}} \right|}^2}} \right)$$

$$\left( {{a^2} - {b^2}} \right)left( {{{\left| {{z_1}} \right|}^2} + {{\left| {{z_2}} \right|}^2}} \right)$$

$$\left( {{a^2} + {b^2}} \right){\left| {{z_1} + {z_2}} \right|^2}$$

$$\left( {{a^2} + {b^2}} \right)left( {{{\left| {{z_1}} \right|}^2} + {{\left| {{z_2}} \right|}^2}} \right)$$