The correct answer is option 4, which is "The National Commission for Women."

A Constitutional Commission is a body or organization that is established by the Constitution of India to address specific issues, protect the rights of marginalized groups, and ensure social justice.

Options 1, 2, and 3 are all Constitutional Commissions.

Option 1, "The National Commission for Scheduled Castes," is a Constitutional Commission that is responsible for safeguarding the rights and interests of the Scheduled Castes or Dalits in India.

Option 2, "The National Commission for Scheduled Tribes," is another Constitutional Commission that is responsible for protecting and promoting the rights, welfare, and development of the Scheduled Tribes or Adivasis in India.

Option 3, "The National Commission for Backward Classes," is also a Constitutional Commission that is tasked with identifying and addressing the issues faced by the socially and educationally backward classes, including the Other Backward Classes (OBCs), in India.

Therefore, option 4, "The National Commission for Women," is not a Constitutional Commission. Although it is a statutory body established through an act of Parliament, it is not mentioned or recognized in the Constitution of India. Alert - correct answer should be "