The given options show the bacterial count, oxygen level and the number of green plants and animals in the river near each of four towns A, B, C and D. Which town is situated near an unpolluted river?

• A. Bacterial count Oxygen level Number of green plants Number of animals Low High Few Few                
• B. Bacterial count Oxygen level Number of green plants Number of animals High Low Few Many                
• C. Bacterial count Oxygen level Number of green plants Number of animals High Low Few Few                
• D. Bacterial count Oxygen level Number of green plants Number of animals Low High Many Many