Who was the first elected prime minister of Nepal? Which political party did he belongs to?

King Mahendra banned the political parties and established "Panchayat Rule" in Nepal on 1st Poush 2017 BS.
    After the starting of panchayat rule in Nepal, the autocratic way of ruling the nation was cruel to the general citizen. No fundamental freedom and rights had been given to the general people. Cruelty and suppression had been continued, National unity and sovereignty of the country was in...

The main objective of the government formed under the chairmanship of Subarna Shumsher are:
        - To implement the constitution of Nepal-2015.
        - To hold the election for parliament.

The constitution of Nepal 2015 was enforced on 1st Falgun, 2015 BS.

The list of the charges king Mahendra mentioned to justify his set of toke over the power are:
        - Political parties has fostered corruption.
        - National interest failed to maintain law and order.
        - Political parties encourages anti-national elements.
        - They were outlawed and failed to establish peace and security.
        - No upliftment of economy...

The major economic achievements during 2007 to 2017 BS are:
        - 5 years action plan was introduced.
        - Land reform plan was implemented.
        - Birta abolition plan was passed.
        - Establishment of free and independent judiciary.
        - Many schools and colleges were established.
        - Introduction...

If I were the member of political party, I would react on the prohibition of political parties imposed by king Mahendra by the following ways:
        - I would aware people to protest against the king and his undemocratic step.
        - I would organize the mass protest rally against the step of the king.
        - I would prepare posters, pamphlets to aware people about...