Three numbers which are co-prime to one another are such that the product of the first two is 551 and that of last two is 1073. The sum of the three numbers is:

Answer: Option C

HCF of 551 and 1073 is 29. So second number is 29
First number = $$\frac{551}{29}$$ = 19
Third number = $$\frac{1073}{29}$$  = 37
So,
Required Sum
= 19 + 29 + 37
= 85