Which of the following action is environment friendly to reduce pollution (i) Use of unleaded petrol in vehicles (ii) Use of pesticides and insecticides in plants (iii) Using sewer treatment plant (iv) Restricting smoking in public to designated space

• A.  (i) and (ii)                     
• B.  (ii) and (iii)        
• C.         (i) (ii) (iii)                      
• D.  (i) (iii) and (iv)