Consider the sample dictionary entry for the word allusion.
allusion
noun: allusion
1. a circuitous reference
based on this entry, which example sentence used the word allusion correctly?
1. in his essay, the author made an allusion to president Obamas inaugural address.
2. i am writing a speech in which i will allusion the problems in our community
3. the mirage was not real; it was an allusion
4. the novel included an allusion chapter in the last half