99.....the killer only killed one but i feel this is a riddle that i dont get lol
A. 
To find greater than or smaller than relation, we multiply the terms like (numerator of L.H.S with denominator of R.H.S and put the value on the left side. Then multiply the denominator of L.H.S with numerator of R.H.S and put the value on right side. Now compare the digits.)
So, solving A, we get 810<209 ... This is false
B. 
= 238>589 ..... This is false
C. 
= 496>780 .... This is false
D. 
= 420<660 ..... This is true
Hence, option D is true.
599 min--›hours
599/60=about 9.98 hours
599 minutes--›days
(599/60)/24=about 0.42 days
answers:
9.98 hours and 0.42 days