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Which railway power source can a locomotive use besides steam and diesel?

AWind sails alone
BTrackside electricity
COnly animal muscle
DSun-powered sails
Answer & Solution
Correct answer: B. Trackside electricity
1. Locomotives can be powered in several ways. 2. Steam, diesel, gas turbine and electricity supplied by trackside systems are all used. 3. Wind sails and solar sails are not used to run a locomotive. _Source: Wikipedia, Transport, section Rail_
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