The correct answer is: a. Palampur Dharamshala
The humid temperate zone is a type of climate that is characterized by warm, wet summers and cool, dry winters. This type of climate is found in many parts of the world, including the eastern United States, Europe, and Asia.
The places listed in option a, Palampur and Dharamshala, are located in the Indian state of Himachal Pradesh. This state is located in the foothills of the Himalayas, and its climate is influenced by both the mountains and the Indian Ocean. The summers in Himachal Pradesh are warm and humid, while the winters are cool and dry.
The places listed in option b, Mandi and Solan, are also located in Himachal Pradesh. However, these places are located in the lower elevations of the state, and their climate is more temperate than that of Palampur and Dharamshala. The summers in Mandi and Solan are warm and dry, while the winters are cool and wet.
The places listed in option c, Chamba and Spiti, are located in the northern part of Himachal Pradesh. These places are located in the high Himalayas, and their climate is much colder than that of the other places listed. The summers in Chamba and Spiti are short and cool, while the winters are long and cold.
The places listed in option d, Una and Sirmaur, are located in the southern part of Himachal Pradesh. These places are located in the lower elevations of the state, and their climate is more temperate than that of the other places listed. The summers in Una and Sirmaur are warm and dry, while the winters are cool and wet.
Therefore, the correct answer is: a. Palampur Dharamshala