Concept:The Battle of Camel was fought between the supporters of Ali and those of Aishah, Talha, and Zubayr.Explanation:The Battle of Camel took place in 656 CE.Its main participants were Aishah, Talha, and Zubayr on one side.Abu Bakr was the first Caliph after Prophet Muhammad.He had passed away before this battle occurred.Therefore, Abu Bakr did not participate in the Battle of Camel.Answer:B. Abu Bakr