If the volume of parallelepiped formed by the vectors \(\hat i + \lambda \hat j + \hat k,\;\hat j + \lambda \hat k,{\rm{\;and\;}}\lambda \hat i + {\rm{\hat k}}\) is minimum, then λ is equal to:

• A. \(- \frac{1}{{\sqrt 3 }}\)
• B. \(\frac{1}{{\sqrt 3 }}\)
• C. √3
• D. \(- \sqrt 3\)