Maximum permissible limit of industrial noise as recommended by World Health Organisation (WHO) is _____________ decibels?

A. Highly
B. Moderately
C. Extremely
D. Very extremely

A. Photochemical smog
B. Peroxyacetyl nitrate (PAN) or methyl nitrite
C. Benzopyrene
D. Polyacrylonitrile

A. Blood poisoning
B. Anaemia
C. Nervous system disorder
D. All A., B. & C.

A. 100
B. 1000
C. 400
D. 4000

A. Filtration
B. Digestion
C. Sedimentation
D. Both B. and C.

A. Radioactive
B. Organic
C. Inorganic
D. None of these