Sohgaura is not a Harappan site. It is a site belonging to the Painted Grey Ware culture, which existed in the upper Ganga-Yamuna doab region around 1200-600 BCE.
Chanhudaro and Kot Diji are both Harappan sites located in the Indus Valley region of the Indian subcontinent. Desalpur is also a Harappan site, located in the Kutch region of Gujarat, India.