Which one of the following methods is followed in electing the Preside

Which one of the following methods is followed in electing the President of India?

Proportional Representation only
First-Past-the-Post System only
Proportional Representation and the Single Transferable Vote System
Proportional Representation and the First-Past-the-Post System
This question was previously asked in
UPSC CDS-1 – 2022
As per Article 55 of the Constitution of India, the election of the President is held in accordance with the system of Proportional Representation by means of the Single Transferable Vote. This system ensures that the voting is by secret ballot and the value of votes of elected members of Parliament and state legislative assemblies is proportional to the population they represent.
The President of India is elected using the Proportional Representation by means of the Single Transferable Vote system.
The Electoral College for the Presidential election consists of the elected members of both Houses of Parliament and the elected members of the Legislative Assemblies of the States and the Union Territories of Delhi and Puducherry. The value of votes of MLAs varies depending on the population of their state, while the value of votes of MPs is uniform.