Final answer:
The four Jubilees celebrated during Imam Sultan Muhammad Shah's Imamat were the Diamond, Silver, Platinum, and Gold Jubilees, marking significant leadership anniversaries in the Nizari Ismaili community.
Step-by-step explanation:
During Imam Sultan Muhammad Shah's Imamat, four Jubilees were celebrated: Diamond, Platinum, Silver, and Golden.
The four Jubilees that were celebrated during Imam Sultan Muhammad Shah's Imamat were: a) Diamond, Silver, Platinum, Gold. These Jubilees mark significant anniversaries during his leadership and are celebrated with various ceremonies and events by the Nizari Ismaili community, which he led as the 48th Imam. The Diamond Jubilee marks 60 years, the Silver Jubilee marks 25 years, the Platinum Jubilee signifies 70 years, and the Gold Jubilee signifies 50 years of his leadership.