Which one of the following offices have/has not been provided by the Indian Constitution?

The office of the Deputy Prime Minister is an extra-constitutional or non-constitutional post, as there is no specific provision or mention of it in the Constitution of India. In contrast, the positions of Deputy Chairman of Rajya Sabha (Article 89), Deputy Speaker of Lok Sabha (Article 93), and Deputy Speaker of a State Legislative Assembly (Article 178) are explicitly mandated constitutional offices.