How does one qualify to become a Nigerian citizen,See below…

1. You were born there,
2. You are the child/grandchild of a Nigerian or married to a Nigerian and
3. Naturalisation (requires application)
a. you are a person of full age and capacity
b. you are a person of good character
c. you have shown a clear intention of his desire to be domiciled in Nigeria
d. you have taken the Oath of Allegiance
e. i. resided in Nigeria for a continuous period of fifteen years; or
ii. resided in Nigeria continuously for a period of twelve months, and during the period of twenty years immediately preceding that period of twelve months has resided in Nigeria for periods amounting in the aggregate to not less than fifteen years.