Q.
According to National Ambient Air Quality Standards in India, the permissible 24 hour average concentration of lead in ambient air of an industrial area is :
[A] 1.0 mg/m3
[B] 2.0 mg/m3
[C] 3.03 mg/m3
[D] 4.0 mg/m3
Answer & Explanation
Answer: (A) is true, but (R) is false.