Statement I : The Rajya Sabha is not subject to dissolution and the members enjoy a tenure of six years
Statement II : According to Article 83 of the Constitution of India, one third of members of Rajya Sabha retire every two years
This question requires evaluating two statements about the Rajya Sabha, India's upper house of Parliament.
Statement I asserts that the Rajya Sabha is not subject to dissolution and its members have a six-year tenure. This is factually correct. The Rajya Sabha is designed as a permanent body, unlike the Lok Sabha, and does not dissolve. Each member serves a term of six years.
Statement II points to $Article 83$ of the Indian Constitution, stating that one-third of Rajya Sabha members retire every two years. This accurately describes the operational mechanism ensuring the Rajya Sabha's continuous existence and the staggered nature of member tenures. This provision prevents the entire house from being reconstituted at once.
Statement II provides the specific constitutional mechanism (retirement of one-third members every two years as per $Article 83$) that explains *how* the Rajya Sabha maintains its non-dissolving nature and ensures members serve a six-year term (two terms of two years within the six years). Therefore, Statement II serves as the correct explanation for Statement I.
Both statements are individually true, and Statement II correctly explains the functioning described in Statement I.