Correct option is B
A. Formation of Punjab Hindu Mahasabha — 1909 (III): The Punjab Hindu Mahasabha was formed in 1909, focusing on protecting Hindu interests.
B. First session of the All India Hindu Mahasabha — 1915 (IV): The All India Hindu Mahasabha conducted its first session in 1915 to consolidate Hindu society politically.
C. Founding of Sabarmati Ashram at Ahmedabad — 1916 (I): Mahatma Gandhi established the Sabarmati Ashram in Ahmedabad in 1916, making it a center for political and social activities.
D. Founding of Satyagraha Sabha — 1919 (II): Gandhi founded the Satyagraha Sabha in Bombay in 1919 to protest against the Rowlatt Act.