Select the set in which the numbers are related in the same way as are the numbers of the following sets.
(NOTE : Operations should be performed on the whole numbers, without breaking down the numbers into its constituent digits. E.g 13 - Operations on 13 such as adding /deleting /multiplying etc. to 13 can be performed. Breaking down 13 into 1 and 3 and then performing mathematical operations on 1 and 3 is NOT allowed)
(2, 3, 25)
(3, 4, 49)

(2, 3, 25)

Third number = $$(first\ number+second\ number)^2$$

= $$(2+3)^2$$

= $$5^2$$

= 25

(3, 4, 49)

Third number = $$(3+4)^2$$

= $$7^2$$

= 49

Option (a) (4, 5, 81)

Third number = $$(4+5)^2$$

= $$9^2$$

= 81

The above-given logic is applicable here. So this is the correct answer.

Option (b) (4, 5, 91)

Third number = $$(4+5)^2$$

= $$9^2$$

= 81

The above-given logic is not applicable here. So this is not the correct answer.

Option (c) (4, 6, 110)

Third number = $$(4+6)^2$$

= $$10^2$$

= 100

The above-given logic is not applicable here. So this is not the correct answer.

Option (d) (4, 7, 111)

Third number = $$(4+7)^2$$

= $$11^2$$

= 121

The above-given logic is not applicable here. So this is not the correct answer.