If, \({\rm{a}} = \frac{{\sqrt 3 + \sqrt 2 }}{{\sqrt 3 - \sqrt 2 }}\:{\rm{and\;b}} = \frac{{\sqrt 3 - \sqrt 2 }}{{\sqrt 3 + \sqrt 2 }}\), then what is the value of a2 + b2 - ab?

• A. 97
• B. (2√3) + 2
• C. (4√6) + 1
• D. 98