(c) $\left| z_{1} \right| = \sqrt{2},\ \ \left| z_{2} \right| = \sqrt{3}$ $\therefore\ \ \ \ \ \ \left| z_{1}z_{2} \right| = \left| z_{1} \right||z_{2} = \sqrt{6}$
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.