The correct answer is b) Periyar.
The Periyar River is the longest river in Kerala, India. It is 244 kilometers (152 mi) long and originates in the Western Ghats mountains. The river flows through the states of Kerala and Tamil Nadu before emptying into the Arabian Sea. The Periyar River is a major source of water for irrigation and drinking water in Kerala. It is also a popular tourist destination, known for its waterfalls and wildlife sanctuaries.
The Bharathapuzha River is the second longest river in Kerala. It is 209 kilometers (130 mi) long and originates in the Western Ghats mountains. The river flows through the districts of Palakkad, Thrissur, and Malappuram before emptying into the Arabian Sea. The Bharathapuzha River is a major source of water for irrigation and drinking water in Kerala. It is also a popular tourist destination, known for its temples and historical sites.
The Pamba River is the third longest river in Kerala. It is 176 kilometers (109 mi) long and originates in the Western Ghats mountains. The river flows through the districts of Pathanamthitta, Alappuzha, and Kottayam before emptying into the Arabian Sea. The Pamba River is a major source of water for irrigation and drinking water in Kerala. It is also a popular tourist destination, known for its temples and backwaters.
The Chaliyar River is the fourth longest river in Kerala. It is 169 kilometers (105 mi) long and originates in the Western Ghats mountains. The river flows through the districts of Kozhikode and Malappuram before emptying into the Arabian Sea. The Chaliyar River is a major source of water for irrigation and drinking water in Kerala. It is also a popular tourist destination, known for its waterfalls and wildlife sanctuaries.