option vs conclusion

option and conclusion both are nouns.

Word	Noun	Adjective	Verb	Adverb
option	Yes	No	No	No
conclusion	Yes	No	No	No

As nouns, conclusion is a hyponym of option; that is, conclusion is a word with a more specific, narrower meaning than option:

option (noun)	conclusion (noun)
the act of choosing or selecting	the act of ending something
one of a number of things from which only one can be chosen	the act of making up your mind about something
the right to buy or sell property at an agreed price; the right is purchased and if it is not exercised by a stated date the money is forfeited	a position or opinion or judgment reached after consideration
	an intuitive assumption
	the last section of a communication
	the proposition arrived at by logical reasoning (such as the proposition that must follow from the major and minor premises of a syllogism)
	a final settlement
	event whose occurrence ends something
	the temporal end; the concluding time