The value of \(\frac{{\sqrt 7 }}{{\sqrt {21} \; + \;\sqrt {14} }} + \frac{{\sqrt 5 }}{{\sqrt {10} - \sqrt 5 }} + \frac{1}{{\sqrt 7 - 4\sqrt 3 }}\) lies between:

The value of \(\frac{{\sqrt 7 }}{{\sqrt {21} \; + \;\sqrt {14} }} + \f

1.	The value of \(\frac{{\sqrt 7 }}{{\sqrt {21} \; + \;\sqrt {14} }} + \frac{{\sqrt 5 }}{{\sqrt {10} - \sqrt 5 }} + \frac{1}{{\sqrt 7 - 4\sqrt 3 }}\) lies between:
A.	5.5 and 6.5
B.	6.5 and 7.5
C.	7.5 and 8.5
D.	8.5 and 9.5
Answer» B. 6.5 and 7.5