Dust collection efficiency of electrostatic precipitator can be as high as 99.9%. Maximum temperature and pressure of dust laden gas that can be cleaned in an electrostatic precipitator is respectively ?
(A) 200°C and 5 atm
(B) 1000°C and 10 atm
(C) 500°C and 50 atm
(D) 1000°C and 500 atm

