A can do half the work in one day where as B can do it full. B can also do half the work of C in one day. Ratio in their efficiency will be?	Choose the most appropriate option: A) 1:2:7 B) 1:2:3 C) 1:2:6 D) 1:2:4 E) 1:2:2
WC of A: B = 1:2   B: C = 1:2   ---------------------   A: B: C = 1:2:4   Answer: 1:2:4
<result>D</result>
A can do half the work in one day where as B can do it full. B can also do half the work of C in one day. Ratio in their efficiency will be?