The correct answer is option 2, Kerala. Kerala is the largest producer of natural rubber in India. Natural rubber is an important agricultural commodity and Kerala has favorable climatic conditions for its cultivation. The state accounts for more than 90% of the total rubber production in the country. The cultivation of natural rubber in Kerala dates back to the late 19th century when it was introduced by the British. The state has a wide network of rubber plantations spread across various districts. These plantations provide employment opportunities to a large number of people and contribute significantly to the state`s economy. Karnataka (option 1), Andhra Pradesh (option 3), and Arunachal Pradesh (option 4) are not major producers of natural rubber.