The sum of first four terms of a geometric progression $(G.P.)$ is $\frac{65}{12}$ and the sum of their respective reciprocals is $\frac{65}{18} .$ If the product of first three terms of the $G.P.$ is $1,$ and the third term is $\alpha$, then $2 \alpha$ is ....... .

  • [JEE MAIN 2021]
  • A

    $5$

  • B

    $6$

  • C

    $2$

  • D

    $3$

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