The correct answer is President.

• The Chief Election Commissioner is appointed by President.
  • The Chief Election Commissioner heads the Election Commission of India.
  • A body constitutionally empowered to conduct free and fair elections to the national and state legislatures and of President and Vice-President.
  • Sushil Chandra Chief Election Commissioner of India and Chairman.
  • A-WEB addressing participants of the International Virtual Election Visitors Programme 2020 for Bihar Legislative Assembly Elections.
  • Chief Election Commissioner Sh. Sunil Arora released a book titled 'Electoral Reforms in India' on January 15, 2021, authored by Dr. Komal Jain.
• Ram Nath kovind is the current president of India.
• Hence, the correct option is 4.

• Chief Minister :
  • A chief minister heads a state government's council of ministers and can be deputed in that role by a deputy chief minister.
  • In the Republic of India, a chief minister is the elected head of government of each state out of 28 states and sometimes a union territory. 
  • The governor appoints and swears in the chief minister, whose council of Ministers are collectively responsible to the assembly.
  • The chief minister is elected through a majority in the state legislative assembly.
  • This is procedurally established by the vote of confidence in the legislative assembly, as suggested by the governor of the state who is the appointing authority.
• Prime Minister :
  • Narendra Damodardas Modi is an Indian politician serving as the 14th and current Prime Minister of India since 2014.
  • He was the Chief Minister of Gujarat from 2001 to 2014 and is the Member of Parliament for Varanasi.
  • The Prime minister can be a member of any of the two houses of the Parliament of India :
    • the Lok Sabha 
    • the Rajya Sabha 
  • The prime minister selects and can dismiss members of the cabinet; allocates posts to members within the government.
  • The prime minister is the senior-most member of the cabinet in the executive of government in a parliamentary system.
• Vice President :
  • Venkaiah Naidu is the current Vice President of India.
  • He defeated UPA's candidate Gopalkrishna Gandhi in the 5 August 2017 election.
  • The Vice President of India is the second-highest constitutional office in India after the President.
  • The Vice President is elected indirectly by members of an electoral college consisting of the members of both Houses of Parliament.
  • The Vice President acts as President in the absence of the president due to death, resignation, impeachment, or other situations.
  • The Vice President of India is Chairperson of the Rajya Sabha.