If \(\left[ {\frac{3}{4} + \left\{ {2\frac{1}{2} - \left( {\frac{1}{2}of\frac{1}{{42}}} \right)} \right\}} \right] \div \left[ {\frac{1}{3} + \left\{ {4\frac{3}{4} - \left( {3\frac{1}{6} - 2\frac{1}{3}} \right)} \right\}} \right] = 1 - \frac{k}{{21}}\) then the value of k is:

If \(\left[ {\frac{3}{4} + \left\{ {2\frac{1}{2} - \left( {\frac{1}{2}

1.	If \(\left[ {\frac{3}{4} + \left\{ {2\frac{1}{2} - \left( {\frac{1}{2}of\frac{1}{{42}}} \right)} \right\}} \right] \div \left[ {\frac{1}{3} + \left\{ {4\frac{3}{4} - \left( {3\frac{1}{6} - 2\frac{1}{3}} \right)} \right\}} \right] = 1 - \frac{k}{{21}}\) then the value of k is:
A.	2
B.	3
C.	5
D.	7
Answer» D. 7