$\root 4 \of {(17 + 12\sqrt 2 )} = $
$\root 4 \of {(17 + 12\sqrt 2 )} = $
- A
$\sqrt 2 + 1$
- B
${2^{1/4}}(\sqrt 2 + 1)$
- C
$2\sqrt 2 + 1$
- D
None of these
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