Concept:Military disengagement from Nigerian politics means reducing military influence and transferring power to civilian democratic institutions.
Explanation:Conducting free and fair elections is a key democratic process that allows civilians to choose their leaders.
This clearly moves the country away from military rule toward civilian governance.
Increasing the military budget (A) does not reduce military involvement; it strengthens the armed forces.
Appointing Army officers into political posts (C) directly increases military control over politics.
Strengthening the Army (D) also enhances military influence rather than withdrawing it from governance.
Therefore, only free and fair elections support genuine military disengagement from politics.
Answer:B. Conduct of free and fair elections