If a/b = 1/2, b/c = 5, c/d = 2/3, d/e = 1/6 and e/f = 2/3, then what is the value of abc/def ?	Options.
A) 50/729	B) 20/456	C) 45/752	D) 13/452	E) 45/741
Say a = 2. Then:   a/b = 1/2 --&gt; b = 4;   b/c = 5 --&gt; c = 4/5;   c/d = 2/3 --&gt; d = 6/5;   d/e = 1/6 --&gt; e = 36/5;   e/f = 2/3 --&gt; f = 54/2.   abc/def = (2*4*4/5)/(6/5*36/5*54/5) = 50/729.   50/729nswer: 50/729.
<result>A</result>
If a/b = 1/2, b/c = 5, c/d = 2/3, d/e = 1/6 and e/f = 2/3, then what is the value of abc/def ?