RRB Group-D Model Paper 16 with answers for online practice

$1^2$ = 1
$2^2$ = 4
$3^2$ = 9
$4^2$ = 16
$5^2$ = 25
$6^2$ = 26
$7^2$ = 49
$8^2$ = 64
$9^2$ = 81
${10}^2$ = 100
We know that a perfect square never ends with 2, 3, 7 or 8
Option 2 ends with 2, so it is not a perfect square.