The correct answer is A. 2001.
Aravalli district was formed on 26 August 2001, by carving out parts of the districts of Banaskantha, Sabarkantha, and Mehsana. It is located in the northern part of Gujarat, and its headquarters is the town of Modasa. The district has a population of over 1.5 million people, and its main languages are Gujarati and Hindi.
The Aravalli district is named after the Aravalli Range, which runs through the district. The range is a mountain range that runs from Gujarat in India to Rajasthan in India. The Aravalli Range is the oldest mountain range in India, and it is a popular tourist destination.
The Aravalli district is a largely agricultural district, and its main crops are wheat, cotton, and groundnut. The district is also home to a number of industries, including textiles, chemicals, and pharmaceuticals.
The Aravalli district is a beautiful and diverse district, and it is a great place to visit. The district is home to a number of historical and cultural sites, and it is also a great place to enjoy the outdoors.
The other options are incorrect because they are not the formation year of Aravalli district in Gujarat.