Assertion : Bharat stage IV emission norms have been in place since April 2010, for 4 wheelers in 13 mega cities of India.
Reason : Green muffler scheme refers to the plantation of trees and shrubns along road sides and is effective to control noise pollution only.

Answer

C

Explanation

Bharat stage emission standards are emission standards issued by the Government of India to regulate the emission of air pollutants from internal combusion engine equipments of motor vehicles. Bharat Stage IV norms have been in place for 4-wheelers in 13 mega cities of india (delhi and NCR, Mumbai, Kolkata, Chennai, Bangalore, Surat, Kanpur, Agra, Lucknow and Sholapur) since April 2010. Green muffler or green belt vegetation is rows of trees and shrubs grown and maintained to serve as noise absorbers. It also reduces air pollution because the trees and shrubs absorb pollution gases and cause settling of suspended particular matter.