Which statement is correct regarding acid rain?
I. The term “acid rain” was coined in 1972 by Robert Angus Smith
II. Rainfall with pH less than 5.6 is called Acid rain.
III. Acid rain is caused by a chemical reaction that starts when sulfur dioxide (SO2) and nitrogen oxides (NOX) are released into the air
(a) I & II (b) Only II (c) II & III (d) All the above