Select the correct option that will fill in the blank and complete the series.
52, 56, 65, 81, 106, .........
$$56-52=4=2^2$$
$$65-56 = 9 =3^2$$
$$81- 65=16=4^2$$
$$106-81 =25=5^2$$
$$142-106 = 36=6^2$$
Option C is correct.
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