The archaeological site of Koldihwa is located at:

Uttar Pradesh

The correct answer is Option (3) → Uttar Pradesh

The archaeological site of Koldihwa is located in the villages of Devghat and Mahagara, situated on the opposing banks of the Belan River, a tributary of the Ganges, in the Prayagraj district of Uttar Pradesh, India. It is one of the few Neolithic sites found in Uttar Pradesh, dating back to around 7th millennium BCE.