The correct answer is option 4, Kerala. In Kerala, a non-Congress government was formed for the first time. This event took place in 1957, after the state assembly elections. The Communist Party of India (CPI) along with other socialist parties formed the government, known as the first communist government in India. This government, led by E. M. S. Namboodiripad, implemented several progressive policies such as land reforms and literacy campaigns. It was a significant moment in Indian political history as it demonstrated that a non-Congress party could successfully form a government in a state. It also paved the way for the formation of non-Congress governments in other states in subsequent years.