According to the 2011 Census of India, how many states had a population of less than 10 lakh (1 million)?

According to the Census of India 2011, only one state had a population of less than 10 lakh (1 million) people. That state was Sikkim, with approximately 6.1 lakh residents. Sikkim is the smallest state in India in terms of both population and area. Despite its small population, Sikkim has a rich cultural heritage, significant biodiversity, and is notable for being India's first fully organic state.