The simplified value of \(\left( {\frac{7}{5} \div \frac{7}{{10}}\;of\ \frac{3}{4}} \right) \div \frac{4}{9} - \left( {\frac{7}{{16}} \div 10\frac{1}{2} \times 7\frac{1}{5}} \right) \times \frac{5}{{12}}\) is:

• A. 47/8
• B. 39/4
• C. 49/8
• D. 41/4