Which of the following Units of Urban Local Self-government does not have…

The 74th Constitutional Amendment Act, 1992 inserted Part IXA (Articles 243P to 243ZG) into the Constitution, and Article 243Q names exactly three categories of Urban Local Self-Government bodies as constitutional institutions: a Nagar Panchayat for an area transitioning from rural to urban, a Municipal Council for a smaller urban area, and a Municipal Corporation for a larger urban area.

Of the four options, Municipal Councils, Nagar Panchayats, and Municipal Corporations are precisely the three categories Article 243Q recognises, so each rests directly on the Constitution. A Cantonment Board, by contrast, is constituted under the Cantonments Act, 2006 — a separate Parliamentary statute administered by the Ministry of Defence for areas around military stations — and is not one of the three Part IXA categories.

• Municipal Councils — one of the three Article 243Q categories; constitutional basis.

• Nagar Panchayats — one of the three Article 243Q categories; constitutional basis.

• Municipal Corporations — one of the three Article 243Q categories; constitutional basis.

• Cantonment Boards — constituted under the Cantonments Act, 2006, not under Part IXA; no constitutional basis.

So the Unit of Urban Local Self-Government without a Constitutional base is the Cantonment Board.