જો $\left( {_{\,\,\,4}^{n - 1}} \right),{\text{ }}\left( {_{\,\,\,5}^{n - 1}} \right)\,$  અને $\left( {_{\,\,\,6}^{n - 1}} \right)\,$ સમાંતર શ્રેણીમાં હોય તો................. મળે

• A

  $\left( {_{\,\,\,6}^{n + 1}} \right) = 2\left( {_{\,\,\,5}^{n - 1}} \right)$

• B

  $2\left( {_{\,\,\,\,6}^{n + 1}} \right) = \left( {_{\,\,\,5}^{n - 1}} \right)$

• C

  $\left( {_{\,\,\,\,6}^{n + 1}} \right) = 4\left( {_{\,\,\,\,5}^{n - 1}} \right)$

• D

  $4\left( {_{\,\,\,\,6}^{n + 1}} \right) = \left( {_{\,\,\,5}^{n - 1}} \right)$