The correct answer is: a) Itanagar.
Itanagar is the capital of Arunachal Pradesh, India. It is located in the central part of the state, on the banks of the Siang River. The city was founded in 1972, and it became the capital of Arunachal Pradesh in 1975. Itanagar is a major administrative, commercial, and educational center in the state. The city is home to the Arunachal Pradesh Legislative Assembly, the Raj Bhavan (the official residence of the Governor of Arunachal Pradesh), and the offices of the state government. Itanagar is also home to a number of educational institutions, including the Rajiv Gandhi University, the National Institute of Technology, Arunachal Pradesh, and the Indian Institute of Technology, Guwahati.
The other options are incorrect because:
- Tawang is a town in the Tawang district of Arunachal Pradesh. It is located in the eastern part of the state, on the border with Bhutan. Tawang is a major Buddhist pilgrimage site, and it is home to the Tawang Monastery, one of the largest monasteries in the world.
- Ziro is a town in the Lower Subansiri district of Arunachal Pradesh. It is located in the central part of the state, on the banks of the Subansiri River. Ziro is a major agricultural center, and it is home to a number of tea gardens.
- Pasighat is a town in the East Siang district of Arunachal Pradesh. It is located in the eastern part of the state, on the banks of the Siang River. Pasighat is a major commercial center, and it is home to a number of government offices.