Saurathsabha fair held in Mithilanchal. Saurath is a village situated six kilometres northeast of Madhubani town in Madhubani district of Bihar, India. It is famous for being the place where thousands of Maithil Brahman converged to fix marriage season. The people gathered at Saurathsabha Gachchhi. This gathering is an annual event held in the Hindu calendar months of Jyeshta- Aasadh. The gathering is organised in an orchard covering 22 bighas of land that was donated by the Maharaja of Darbhanga.Hence, the correct option is (a).