The number of elements in the set $\{ (a,\,b):2{a^2} + 3{b^2} = 35,\;a,\,b \in Z\} $, where $Z$ is the set of all integers, is

  • A

    $2$

  • B

    $4$

  • C

    $8$

  • D

    $12$

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