Answer : 4. "आर. सी. अग्रवाल"
Explanation :

Ganeshwar Civilization - Neem Ka Thana (Sikar) Excavation on the banks of Kantli River RC Aggarwal 1977 Vijaykumar 1978-79 Mother of Copper Age Civilization Evidence of abundant copper material, fish hooks (harpoons), copper pin, stone magan/dam.