A can complete the job in 2 hours and B can complete the same job in 4 hours. A works for 1 hour and then B joins and both complete the job. What fraction of the job did B complete	Select the correct option
A) 1/6  B) 3/10  C) 1/2  D) 5/6  E) 8/9
1/6=1/6
<result>A</result>
A can complete the job in 2 hours and B can complete the same job in 4 hours. A works for 1 hour and then B joins and both complete the job. What fraction of the job did B complete