Which of the following statements is not correct?

Statement B is incorrect because Northeast India does not account for half of the countrys tribal population. According to the 2011 Census, Central India holds the vast majority of the tribal population, with states like Madhya Pradesh, Maharashtra, Odisha, and Chhattisgarh having the highest numbers. The Northeast accounts for only about 12 percent of the total tribal population of India.

Regarding the other options: Statement A is correct because the Constitution provides the process for identifying Scheduled Tribes under Article 342 but does not provide a specific definition for them. Statement C is correct as the Toda people are a well known pastoral community residing in the Nilgiri Hills of Tamil Nadu. Statement D is correct as Lotha is one of the major languages spoken by the Lotha tribe in Nagaland.