Below which of the following pH is rain regarded as ‚Äö√Ñ√∂‚àö√ë‚àö‚â§acid rain‚Äö√Ñ√∂‚àö√ë‚àö¬•?

Below which of the following pH is rain regarded as ‚Äö√Ñ√∂

1.	Below which of the following pH is rain regarded as ‚Äö√Ñ√∂‚àö√ë‚àö‚â§acid rain‚Äö√Ñ√∂‚àö√ë‚àö¬•?
A.	7
B.	7.3
C.	5.6
D.	6
Answer» D. 6