The correct answer is: E. No error
The sentence “The education Council is consisted of ten members, all of whom are experienced men” is grammatically correct. The verb “consist” takes a prepositional phrase as its object, and the prepositional phrase “of ten members” modifies the verb. The relative clause “all of whom are experienced men” modifies the noun “members.”
The sentence could be rewritten as “The education Council consists of ten experienced men.” However, the original sentence is also grammatically correct.