Correct answer: (c) Sohgaura
Explanation
- A
Chanhudaro
(a) Chanhudaro. This is a Harappan industrial site in Sind, known for bead-making, so it is a Harappan site and not the ‘not Harappan’ key.
- B
Kot Diji
(b) Kot Diji. Pre-Harappan / Early Harappan type-site in Sind on the Indus, so it is in the Harappan world and not the key.
- C
Sohgaura
(c) Sohgaura. This is a Mauryan-period copper-plate / bronze plaque site in Gorakhpur district, Uttar Pradesh, recording a famine-relief storehouse — not a Harappan settlement. That is why it is the official ‘not a Harappan site’ key.
- D
Desalpur
(d) Desalpur. A Harappan site in Kachchh, Gujarat, so it is Harappan and not the key.
Summary. Official key is (c) Sohgaura. Chanhudaro, Kot Diji and Desalpur sit in the Indus–Saraswati Harappan map. Sohgaura is an early historic Mauryan record from the middle Ganga plain, not a Bronze Age Harappan town. Honour the stored letter (c).