The option A4 model was used in the conduct of the

A.

1993 elections

B.

1999 elections

C.

2007 elections

D.

1988 elections

Correct answer is A

In modern times, the open ballot, also known as Option A4, was first adopted in the Third Nigerian Republic during the 1993 Nigerian presidential election, an election widely considered by Nigerians as the freest and fairest in the country's political history.