The campaign rallies at the local level from November 10 to 30 will highlight the developmental achievements of the central government and flag the state government's incompetency.
A preliminary discussion on candidates was held at a meeting of coalition partners in Kochi on Monday.
If elected, Murmu will be India's first tribal President and also the first born after Independence.
BJP president J P Nadda lauded Dhankhar as a "kisan putra".
BJP president JP Nadda announced the name of the 64-year-old former governor of Jharkhand.
Those who have Class 12 qualification will be admitted to the academies on the basis of this entrance exam and the Services Selection Board (SSB) interview.
The Supreme Court has recently dismissed the centre’s stand that women would be allowed to enter NDA from May next year.
The Supreme Court on Wednesday refused to accept the Centre's request to allow women candidates to appear for the entrance exam to the NDA from next year, saying it doesn't want women to be denied their right.
The Defence Ministry has informed the Supreme Court that a notification allowing women candidates to appear for the entrance exam to the National Defence Academy (NDA) will be out by May next year.
Contrary to earlier surveys that predicted a massive LDF win, the exit polls hinted at a stiff electoral battle, making UDF hopeful.