Concept:Thermal plants generate electricity by burning fuel, but not all power stations in Nigeria are thermal.Explanation:Egbin is a thermal power station located in Lagos.Ijora is also a thermal power station in Lagos.Afam (written as Afarn in the options) is a thermal plant in Rivers State that uses natural gas.Shiroro is not thermal; it is a hydro-electric power plant.Therefore, Shiroro is the odd one among the listed options.Answer:B. Shiroro