We can see its written Magellan in sentence 1 whereas Fernando de Magellan in sentence 4 therefore sentence 1 will come after sentence 4..Sentence 1 cannot be the starting sentence as its describes the cargo but not about who’s cargo is it?
Sentence 2 cannot be starting sentence also as it indicates continuation of a similar idea. It will come after its supporting sentence.
Furthermore we can see its written armada in sentence 3 where as full form armada de molluca is written in sentence 4 therefore 3 will come after 4.this rules out option C.
4 will be the starting sentence here and 5 will follow 4 as it correctly shows the journey of armada ship. 1 describes the armada and in sentence 5 it is mentioned that he begins his journey.
Therefore option A i.e. 45312 will be the correct answer.