(c) $C_{PR} = \frac{C}{2} + \frac{C}{3} = \frac{5C}{6}$ $C_{PQ} = C + \frac{C}{4} = \frac{5C}{4} \Rightarrow \frac{C_{1}}{C_{2}} = \frac{2}{3}$
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.