Given below are two statements:
Statement I: The pH of rain water is normally ~5.6.
Statement II: If the pH of rain water drops below 5.6, it is called acid rain.
In the light of the above statements, choose the correct answer from the options given below:

Statement I states that the pH of rain water is normally ~5.6. This is true because atmospheric $$CO_2$$ dissolves in rainwater to form carbonic acid: $$CO_2 + H_2O \rightarrow H_2CO_3$$. This weak acid lowers the pH of pure rainwater from 7.0 to approximately 5.6.

Statement II states that if the pH of rain water drops below 5.6, it is called acid rain. This is also true. Acid rain is defined as rain with a pH below the normal value of 5.6, typically caused by pollutants such as $$SO_2$$ and $$NO_x$$ that form sulphuric acid and nitric acid in the atmosphere.

Since both statements are true, the correct answer is option (1): Both Statement I and Statement II are true.