The rate per kg of material P, Q, R & S are respectively ₹ 12,₹ 15,₹ 18 & ₹ 21. The input-output ratios of the material are 140%, 130%, 120% & 110% respectively. The most economical material for production is

Q. The rate per kg of material P, Q, R & S are respectively ₹ 12,₹ 15,₹ 18 & ₹ 21. The input-output ratios of the material are 140%, 130%, 120% & 110% respectively. The most economical material for production is:

A.            P

B.            Q

C.            R

D.            S

Answer: P