Which one of the following is the highest peak of South Bengal?

Gorgaburu is the highest peak of the Ayodhya Hills, situated in the Purulia district, making it the highest point in the southern region of West Bengal (South Bengal) with an elevation of approximately $677\text{meters}$. Sandakphu ($3636\text{meters}$) is the highest peak of the entire state but is located in North Bengal (Darjeeling district). Pareshnath is located in Jharkhand, and Biharinath is in Bankura district ($451\text{meters}$).