In Bihar, a keen contest is likely to take place between the ruling NDA and opposition parties in the sixth and final phase of Assembly elections to be held tomorrow. AIR correspondent reports that opposition leaders have mustered their full strength to increase their tally.In the last Assembly elections, NDA wrested 13 out of 26 seats. RJD won five and BSP three seats. Congress, LJP and CPI( ML) got one seat each. Two independent candidates Dadan Singh Yadav and Pradeep Joshi were also elected.In tomorrows election, NDA, Congress, BSP and RJD-LJP alliance are contesting all the seats. CPI(ML) has fielded 17 candidates. CPI is contesting from 7 seats.