The correct answer is: a) Mahendragiri
Mahendragiri is the highest peak in Andhra Pradesh, India. It is located in the Eastern Ghats mountain range, and is part of the Mahendragiri Biosphere Reserve. The peak is 1,502 meters (4,929 feet) above sea level.
Arma Konda is the second highest peak in Andhra Pradesh, at 1,486 meters (4,874 feet). It is located in the same mountain range as Mahendragiri, and is also part of the Mahendragiri Biosphere Reserve.
Jindhagada is the third highest peak in Andhra Pradesh, at 1,478 meters (4,849 feet). It is located in the Eastern Ghats mountain range, and is not part of any biosphere reserve.
Deomali is the fourth highest peak in Andhra Pradesh, at 1,461 meters (4,800 feet). It is located in the Eastern Ghats mountain range, and is not part of any biosphere reserve.
Mahendragiri is a popular tourist destination, and is known for its scenic beauty. The peak is also home to a number of temples and shrines.