Explanation:

Recently, the Supreme Court of India held that in any election, be it to Parliament or State legislature, the maintenance of secrecy of voting is “a must”.

• It reiterated its 2013 judgement in the People's Union for Civil Liberties case.
• The court held that it is a part of Fundamental Right, as any arbitrary distinction between the voter who casts his vote and the voter who does not cast his vote is violative of Article 14, Article 19(1)(a) and Article 21 of the Indian Constitution.
• The secrecy is a part of the fundamental right of freedom of expression.

The Supreme Court in People's Union for Civil Liberties case, 2013, held that, there are the two main key components of right to secrecy of vote

• Right to vote also includes a right not to vote i.e right to reject.
• Right to secrecy is an integral part of a free and fair election.
• Further, the confidentiality of choice strengthened democracy. 
• Article 21(3) of the Universal Declaration of Human Rights and Article 25(b) of the International Covenant on Civil and Political Rights deals with the “Right to secrecy".

Hence all statements are correct.