The recently formed district known for its poultry industry is:

Namakkal
Chengalpattu
Kallakurichi
Tirupattur

The correct answer is Namakkal.

Namakkal is a district in the Indian state of Tamil Nadu. It was formed on 15 August 2019 by bifurcating the Salem district. The district is known for its poultry industry, which is the largest in the state. The district has a population of over 2.5 million people and is located in the central part of Tamil Nadu. The headquarters of the district is the town of Namakkal.

The other options are incorrect. Chengalpattu is a district in the Indian state of Tamil Nadu. It is located in the northern part of the state and is the northernmost district of Tamil Nadu. The district has a population of over 3.5 million people and is headquartered in the town of Chengalpattu. Kallakurichi is a district in the Indian state of Tamil Nadu. It is located in the central part of the state and is headquartered in the town of Kallakurichi. Tirupattur is a district in the Indian state of Tamil Nadu. It is located in the northern part of the state and is headquartered in the town of Tirupattur.

The poultry industry in Namakkal is the largest in the state of Tamil Nadu. The district has over 10,000 poultry farms and produces over 100 million eggs per day. The poultry industry is a major source of employment in the district and contributes significantly to the state’s economy.