Consider the following:
Excess of which of the above in the environment is/are cause(s) of acid rain?
(a)
1, 2 and 3
(b)
2 and 4 only
(c)
4 only
(d)
1, 3 and 4
Consider the following:
Excess of which of the above in the environment is/are cause(s) of acid rain?