In reverse osmosis, the membrane pores are smaller in size about ___________
(a) 0.04 to 600nm
(b) 0.08 to 500nm
(c) 0.1 to 600nm
(d) 0.2 to 500nm
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I'm obligated to ask this question of Reverse Osmosis, Ultrafilteration, COD and BOD in division Water of Applied Chemistry