If the initial velocity in horizontal direction of a projectile is unit vector $\hat{i}$ and the equation of trajectory is $y =5 x (1- x )$. The $y$ component vector of the initial velocity is.

(Take $g=10\,m / s ^{2}$ )

  • [JEE MAIN 2022]
  • A

    $4$

  • B

    $3$

  • C

    $5$

  • D

    $80$

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