Mark (✓) against the correct answer

(d) 216

$121=11 \times 11$

$169=13 \times 13$

$196=7 \times 7 \times 2 \times 2$

$216=2 \times 2 \times 2 \times 3 \times 3 \times 3=(2)^{3} \times(3)^{3}=(6)^{3}$

$216=6^{3}$

Hence, 216 is a perfect cube.