Which one of the following is not a Constitutional Commission of India?

The National Commission for Women (NCW) is a statutory body, not a constitutional one. It was established in 1992 under the National Commission for Women Act, 1990 [3]. In contrast, the other three commissions are directly established by the Constitution of India. The National Commission for Scheduled Castes (NCSC) is established under Article 338 [6]. The National Commission for Scheduled Tribes (NCST) was created as a separate constitutional body by the 89th Amendment Act of 2003 under Article 338-A [4]. The National Commission for Backward Classes (NCBC), which was initially a statutory body, was granted constitutional status via the 102nd Amendment Act of 2018, which inserted Article 338-B into the Constitution [5]. Therefore, while NCSC, NCST, and NCBC derive their authority from specific constitutional articles, the NCW remains a statutory entity.

Sources

1. [3] Indian Polity, M. Laxmikanth(7th ed.) > Chapter 9: Directive Principles of State Policy > IMPLEMENTATION OF DIRECTIVE PRINCIPLES > p. 116
2. [6] https://en.wikipedia.org/wiki/National_Commission_for_Scheduled_Castes
3. [4] Laxmikanth, M. Indian Polity. 7th ed., McGraw Hill. > Chapter 49: National Commission for STs > CHAPTER 49 National Commission for STs > p. 438
4. [1] Introduction to the Constitution of India, D. D. Basu (26th ed.). > Chapter 32: MINORITIES, SCHEDULED CASTES AND SCHEDULED TRIBES > CHAP. 32] MINORITIES, SCHEDULED CASTES AND SCHEDULED TRIBES 461 > p. 461
5. [2] Laxmikanth, M. Indian Polity. 7th ed., McGraw Hill. > Chapter 50: National Commission for BCs > ESTABLISHMENT > p. 440
6. [5] Indian Polity, M. Laxmikanth(7th ed.) > Chapter 50: National Commission for BCs > ESTABLISHMENT > p. 440