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    A.

    -875/248

    B.

    -694/315

    C.

    -765/262

    D.

    -995/343

    Correct option is D

    Given:  ​
    ​7a−7a+4=07a - \frac{7}{a} +4 = 0 
    value to find ; a3−1a3+1a^3 - \frac{1}{a^3}+1 
    Formula Used: ​
    ​(a−1a)3=a3−(1a)3−3(a−1a)\left(a-\frac{1}{a}\right)^3 = a^3 - \left( \frac{1}{a}\right)^3-3\left(a-\frac{1}{a}\right)​​
    Solution:
    ​

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