The correct answer is option 1: 1 and 2 only.

Acid rain is caused by the presence of certain gases in the atmosphere that react with water vapor to form acidic compounds. These gases include oxides of sulphur (option 1) and oxides of nitrogen (option 2).

1) Oxides of sulphur, such as sulfur dioxide (SO2), are released into the atmosphere through various natural and human activities, such as the burning of fossil fuels and volcanic eruptions. When these gases mix with water vapor in the atmosphere, they form sulfuric acid, which then falls to the earth`s surface as acid rain.

2) Oxides of nitrogen, such as nitrogen dioxide (NO2), are mainly produced by the burning of fossil fuels, vehicle emissions, and industrial processes. When these gases react with water vapor, they form nitric acid, which is another component of acid rain.

Option 3, which includes oxides of carbon, is incorrect because carbon dioxide (CO2) is not responsible for acid rain. Instead, it contributes to global warming and climate change. Therefore, the correct combination of gases responsible for acid rain is option 1: 1 and 2 only.