Jharia, Dec. 14 -- In the coal mining town of Jharia in Jharkhand, the murder of a politician two years ago is the focal point of the election campaign of rival candidates and sisters-in-law Ragini Singh of the Bharatiya Janata Party and Purnima Singh of the Congress. The seat goes to polls on November 16 in the fourth round of the five-phase polling in Jharkhand....