Final answer:
Mowlana Sultan Muhammad Shah spent his last days at Villa Yakimour in Geneva.
Step-by-step explanation:
Mowlana Sultan Muhammad Shah, also known as Aga Khan III, spent his last days at Villa Yakimour in Geneva. This residence has historical significance as the place where a notable figure in the Ismaili community resided towards the end of his life. The other options listed, including Villa Barakat, Villa Rose, and Villa Bellerive, are not associated with this historical context.