Explanation:

- Phaphamau: This is a small town near Allahabad (Prayagraj) in Uttar Pradesh, located on the banks of the river Ganga.

- Hazaribagh: Located in the state of Jharkhand, Hazaribagh is not situated on the banks of the Ganga. It is more known for its forests and national parks.

- Kanpur: This is a major industrial city in Uttar Pradesh and lies along the Ganga river.

- Varanasi: Known as the spiritual capital of India, Varanasi is a city on the banks of the Ganga and is famous for its ghats and temples.

Correct Answer: Option 2, Hazaribagh