Dhiman filed his nominations from Jaswan-Pragpur constituency while Rama Mahindra entered the fray from Palampur as Himachal Swabhiman Party candidate.
Bhagat Singh filed his nominations from Arki constituency as NCP candidate while Independent Sushil Kumar entered the fray from Bhatiyyat constituency in Chamba district.
The last date for filing nominations is October 17 while withdrawal of nominations would be permitted up to October 20.