…… is a source of energy has been known to the mankind since the mid seventeenth century. A) Fossil fuel B) That fossil fuel C) Fossil fuel, which D) None of these Related MCQs: The novel as a vehicle for psychological analysis rather than the recounting of events, became the realm literary roan in mid ……. century? Which among the following is alternate source of energy? The source of energy for human brain is? Gandhara Civilization existed in which side of Pakistan from 2nd century to 5th century ..?