'What does NATO stand for' vs 'Where does NATO stand for?'

[Olena]

English Grammar Tests, Elementary Level

ESL/EFL Test #93 "Why Questions", question 5

......... does NATO stand for?

(a) What
(b) Which
(c) Where
(d) who

English Grammar Tests, Elementary Level

ESL/EFL Test #93 "Why Questions", answer 5

What does NATO stand for?

Correct answer: (a) What

Your answer was: correct
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why not where?

Olena

[Mister Micawber]

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The sentence asks for a definition, not a location.
.
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Native English teacher at Mister Micawber's