The correct answer is option 2: 2 and 3.

Statement 1: Atmospheric pressure decreases towards poles. This statement is incorrect. Atmospheric pressure does not necessarily decrease towards the poles. The variation in atmospheric pressure is more influenced by weather systems rather than latitude.

Statement 2: Atmospheric pressure decreases with altitude. This statement is correct. As we move higher in the atmosphere, the air becomes less dense and the pressure decreases. This is why we experience lower atmospheric pressure at higher altitudes, such as in mountains.

Statement 3: High pressure is experienced over continents during winter. This statement is correct. During the winter months, continents cool faster than oceans, leading to the formation of high-pressure systems over land. This is because cold air is denser and thus exerts higher pressure.

Statement 4: All deserts experience low pressure throughout the year. This statement is incorrect. While deserts are associated with high temperatures, it does not necessarily mean that they always experience low pressure. The pressure in deserts can vary depending on the weather patterns and other factors.

In conclusion, option 2 is correct as it includes statement 2 and statement 3, which are both accurate.