Consider the following statements:
1. The first cement factory in Chhattisgarh was established in 1965.
2. Construction of wagon repairs shop occurred in 1966.
3. Thermal Plant of N. T. P. C. is in Korba and Bilaspur districts.
4. Bharat Aluminium company limited Balco established in 1975.
Select the correct answer.

A. 1, 2, 4 are correct

B. Only 1 and 3 are correct

C. Only 2 and 4 are correct

D. 1, 2, 3 are correct

E. Only 1 and 4 are correct

Answer: Option D