Consider the following statements about India’s population distribution:

A. Uttar Pradesh, Maharashtra, Bihar, and West Bengal together account for more than half of India’s total population.
B. States like Jammu & Kashmir and Uttarakhand have a low population despite a large geographical area.
C. Physical factors like terrain and water availability influence population distribution.
D. Urbanisation has had minimal impact on population concentration in India.

Which of the above statements are correct?