Who is not among the khulafa 'ul Rashidun except?

The term "Khulafa 'ul Rashidun" refers to the first four caliphs who led the Muslim community after the death of the Prophet Muhammad (peace be upon him). These caliphs are often called the "Rightly Guided Caliphs" because they are viewed as following closely in the footsteps of the Prophet.

Among the names listed:

• Abu Bakr bn Abi Quhafah - He was the first caliph after the Prophet Muhammad (peace be upon him) and is the first among the Khulafa 'ul Rashidun.
• Umar bn Al-Khattab - He succeeded Abu Bakr and is the second caliph, though his name is not in the options listed.
• Uthman bn Affan - He was the third caliph and is a part of the Khulafa 'ul Rashidun.
• Ali bn Abi Talib - He was the fourth caliph and is also one of the Khulafa 'ul Rashidun.

The name that does not belong to the group of Khulafa 'ul Rashidun is Mu'awiyah bn Abi Sufyan. Although Mu'awiyah was a significant figure in early Islamic history and later became a caliph, he was not part of the Khulafa 'ul Rashidun, who were the first four caliphs.