1st pair
3, 3,4,5 = 63
3 + 3 + 4 + 5 = 15 × 2= 30 - 2² - 5= 21 × 3= 63
2nd pair
8,4,4,3 = 51
8 + 4 + 4 + 3 = 19 × 2= 38 - 4² - 5= 17 × 3= 51
go with the same logic for 3rd pair:
9,7,5,9 = ?
9 + 7 + 5 + 9 = 30 × 2= 60 - 6² - 5= 19 × 3= 57
Therefore, 9,7,5,9 = 57 option(a)