Which of the following monuments has NOT been notified as a National Geo-heritage Monument by the Geological Survey of India (GSI)?

Gingee Fort Villupuram District, Tamil Nadu

The correct answer is Option 4 - Gingee Fort Villupuram District, Tamil Nadu

Out of the listed monuments, Gingee Fort in Tamil Nadu is not a National Geo-heritage Monument.

Pillow Lava in Iron Ore belt at Nomira, Odisha
Peninsular Gneiss Lalbagh, Karnataka
Nagahill Ophiolite site near Pungro, Nagaland
These are all geological features recognized by the Geological Survey of India (GSI).