Concept:The question asks which military regime first handed over power to an elected civilian government in Nigeria.
Explanation:The Murtala/Obasanjo regime oversaw the transition to democracy.
General Murtala Mohammed started the transition programme, and after his death, General Olusegun Obasanjo completed it.
A constitution drafting committee led by Chief Rotimi Williams produced the draft, which was later reviewed by a constituent assembly headed by Justice Udo Udoma.
This process led to the 1979 general elections and the inauguration of the Second Republic.
On October 1, 1979, power was successfully handed over to President Shehu Shagari, making this regime the first military government to hand over power to civilian rule.
Answer:C. Murtala/Obasanjo's regime.