S1:tMetals are today being replaced by polymers in many applications.P :tAbove all, they are cheaper and easier to process making them a viable alternative to metals.Q :tPolymers are essentially a long chains of hydrocarbon molecules.R :tToday polymers as strong as metals have been developed.S :tThese have replaced the traditional chromium-plated metallic bumpers in cars.S6:tMany Indian Institutes of science and Technology run special programmes on polymer science.The Proper sequence should be:

• A. QRSP
• B. RSQP
• C. RQSP
• D. QRPS