Option (D) 1210 million is the correct answer. The context shows this question from the NCERT textbook exercise. While the provided text discusses population density (382 persons per sq km in 2011) and distribution patterns, it does not explicitly state the total population figure. However, this is a standard factual question from the NCERT Geography Class 12 textbook, and the 2011 Census recorded India's population as approximately 1210 million (1.21 billion).