Which of the following is wrong?

(1) Delhi leads the country in its level of air pollution

(2) Delhi has more cars than the states of Gujrat and West Bengal put together

(3) In 1990s, Delhi ranked fourth among the 41 most polluted cities of the world

(4) PIL was filed in High court against the Air pollution in Delhi

(1) Before the orders of Supreme court

(2) By the end of 2002

(3) In 1990

(4) Under the act of environment in 1987

(1) It burns more efficiently

(2) Is left unburnt in very little amount

(3) Cheaper

(4) All of these

(1) Difficulty in laying down pipelines for the distribution of CNG

(2) Difficulty in ensuring uninterrupted supply

(3) Can be siphoned off by thieves

(4) Both A and B

(1) Cheaper

(2) Cannot be adulterated

(3) Burns more efficiently

(4) All of these

(1) Phasing out of old vehicle

(2) Use of unleaded petrol

(3) Use of low sulphur petrol and diesel

(4) Use of electrostatic precipitator in Vehicles

(1) Reducing sulphur and aromatic content in petrol and diesel fuel

(2) Reducing lead in petrol

(3) Increasing CNG use

(4) All of these

(1) a-50 ppm

(2) a-150 ppm

(3) b-150 ppm

(4) a-200 ppm

(1) Euro II Norms

(2) Euro III Norms

(3) Euro IV Norms

(4) Euro I Norms

(1) 42 per cent

(2) 150 ppm

(3) 50 ppm

(4) 30 per cent