The coefficient of $t^{4}$ in the expansion of ${(1 + t^{2})}^{3}$

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Solution

The correct option is A 3
$(1 + t^{2})^{3} 1 + 3 t^{2} + 3 t^{4} + t^{6}$

Coefficient of $t^{4}$ is $3$

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