The amount of coagulant needed for coagulation of water increases with (i) Increase in turbidity of water (ii) Decrease in turbidity of water (iii) Increase in temperature of water (iv) Decrease in temperature of water The correct answer is

• A. (i)and(iv)
• B. (ii) and (iii)
• C. (i) and (ii)
• D. (ii) and (iv)

Answer: (A)