સદીશ $\mathop {\text{A}}\limits^ \to  \,\, = \,\,4\hat i\,\, + \;\,3\hat j\,\, + \;\,6\hat k$ અને $\mathop B\limits^ \to  \,\, = \,\, - \hat i\,\, + \;\,3\hat j\,\, - \,\,8\hat k$ નો પરિણમી સદીશ એ એક્મ સદીશને સમાંતર હોય તો ,$\vec R$ ........  

• A

  $\frac{1}{7}\,\,\left( {3\hat i\,\, + \;\,6j\,\, - \,\,2\hat k} \right)$

• B

  $\frac{1}{7}\,\,\left( {3\hat i\,\, + \;\,6j\,\, + \,\,2\hat k} \right)$

• C

  $\frac{1}{{49}}\,\,\left( {3\hat i\,\, + \;\,6\hat j\,\, + \;\;2\hat k} \right)$

• D

  $\frac{1}{{49}}\,\,\left( {3\hat i\,\, + \;\,6\hat j\,\, - \;\;2\hat k} \right)$