Among the following, a cubic surd is

Among the following, a cubic surd is

A
$\sqrt[3]{8}$
B
$\sqrt{20}$
C
$\sqrt[3]{7}$
D
$\sqrt[4]{5}$

Solution:

Here Option A,C has same order 3, but $\sqrt[3]{8}$ is not a surd. Then $\sqrt[3]{7}$ is the cubic surd

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