The greatest number that will divide 729 and 901 leaving remainder 9 and 5 respectively is = ?

Answer: Option B

729 - 9 = 720
901- 5 = 896
HCF (720, 896)
$$\underset{176}{\underbrace{720\text{896}}}$$
⇒ 11 × 16
⇒ HCF = 16