Correct Option: D

Given in question , Total profit = $ 56100
∴ Ratio of equivalent capitals of A, B and C for 1 month = { 40500 × 6 + ( 40500 + 4500 ) × 6 } : { 45000 × 12 } : { 60000 × 6 + ( 60000 - 15000 ) × 6 }
Ratio of equivalent capitals of A, B and C for 1 month = (40500 × 6 + 45000 × 6) : (45000 × 12) : (60000 × 6 + 45000 × 6)
Ratio of equivalent capitals of A, B and C for 1 month = (405 + 450) : (450 × 2) : (600 + 450) = 855 : 900 : 1050
Ratio of equivalent capitals of A, B and C for 1 month = 171 : 180 : 210 = 57 : 60 : 70
Sum of the ratios = 57 + 60 + 70 = 187