What is an eccentric person?

[Edddy]

English Language Proficiency Tests, Advanced Level

ESL/EFL Test #590 "Real Life: Personalities (1)", question 2

Robert is a real .......... Even when he faces hardships, he always looks on the bright side of things. He's a really positive, happy person.

(a) pessimist
(b) optimist
(c) eccentric person
(d) cynic

English Language Proficiency Tests, Advanced Level

ESL/EFL Test #590 "Real Life: Personalities (1)", answer 2

Robert is a real optimist. Even when he faces hardships, he always looks on the bright side of things. He's a really positive, happy person.

Correct answer: (b) optimist
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what's a eccentric person

[Gray]

Eccentric person: One that deviates markedly from an established norm, especially a person of odd or unconventional behaviour.

http://dictionary.reference.com/browse/eccentric
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First lesson - English, not english. I, not i. ~A student of English