What will come in place of '?' in the following equation?\(4 + \frac{1}{6} \times \left[ {\left\{ { - 12 \times \left( {24 - 12 - 4} \right)} \right\} \div \left( {20 - 4} \right)} \right] = \;?\)

• A. 6
• B. 5
• C. 3
• D. 4