The correct answer is: 1984.
The Kiriburu-Bimalgarh railway line is a 108-kilometer-long railway line in India that connects the towns of Kiriburu and Bimalgarh in the state of Jharkhand. The line was opened in 1984 and is operated by the South Eastern Railway zone of the Indian Railways. The line is used to transport iron ore from the Kiriburu mines to the Bimalgarh railway station, where it is loaded onto trains for transportation to other parts of India.
Option A: 1970 is incorrect because the Kiriburu-Bimalgarh railway line was not opened in 1970.
Option B: 1984 is the correct answer because the Kiriburu-Bimalgarh railway line was opened in 1984.
Option C: 1963 is incorrect because the Kiriburu-Bimalgarh railway line was not opened in 1963.
Option D: 1960 is incorrect because the Kiriburu-Bimalgarh railway line was not opened in 1960.