Select the option that is related to the fifth number in the same way as the second number is related to the first number and the fourth number is related to the third number.

7 : 345 :: 8 : 514 :: 2 : ?

Given: 7 : 345 :: 8 : 514 :: 2 : ?

Logic: 2 is added in the cube of first number to get second number.

As,

7 : 345

7³+2=343+2=345

And

8 : 514

8³+2=512+2=514

Similarly,

2 : ?

2³+2=8+2=10

Thus correct option is (a).