The correct answer is: c) Variations in temperature and humidity.
Arunachal Pradesh is a state in North-East India. It is a mountainous state with a diverse climate. The temperature and humidity can vary greatly depending on the time of year and the altitude. In the summer, the temperature can reach up to 40 degrees Celsius, while in the winter, it can drop below freezing. The humidity is also high, especially during the monsoon season. Tourists visiting Arunachal Pradesh need to be prepared for these variations in temperature and humidity. They should pack light clothing for the summer and warm clothing for the winter. They should also pack a raincoat and an umbrella for the monsoon season.
Option a) is incorrect because the weather in Arunachal Pradesh is not always hot. The temperature can vary greatly depending on the time of year and the altitude.
Option b) is incorrect because the rainfall patterns in Arunachal Pradesh are not always predictable. The monsoon season can last for several months, and there can be heavy rains even outside of the monsoon season.
Option d) is incorrect because there is plenty of sunshine in Arunachal Pradesh, especially during the summer.