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

17 : 293 :: ? : 488 :: 21 : 445

22

17 : 293 :: ? : 488 :: 21 : 445

The logic followed here is :

Ist number² + 4 = IInd number

AS

17 : 293 

17² + 4 = 289 + 4 = 293

And

21 : 445

21² + 4 = 441 + 4 = 445

Similarly

? : 488

X² + 4 = 488

X² = 488 - 4

X² = 484

X = 22

Therefore 22 is correct answer