The first Islamic Khalifa of Rashidun lasted from 632 AD to:

The first Islamic Caliphate, known as the Rashidun Caliphate, began in 632 AD following the death of Prophet Muhammad. This period was characterized by the rule of the first four 'Rightly Guided' Caliphs: Abu Bakr, Umar, Uthman, and Ali.

• The Rashidun Caliphate concluded in 661 AD.
• This year marks the assassination of the fourth Caliph, Ali ibn Abi Talib.
• His death led to the end of the Rashidun era and the subsequent establishment of the Umayyad Caliphate, which transitioned the leadership into a dynastic rule.

The other options provided are incorrect dates for the conclusion of the Rashidun Caliphate, which is a pivotal period in early Islamic history.