Two springs having spring constants $k_1$ and $k_2$ are connected in series,their resultant spring constant is $2 \text{ unit}$. If they are connected in parallel,their resultant spring constant is $9 \text{ unit}$. Find the values of $k_1$ and $k_2$.

  • A
    $6 \text{ unit}, 3 \text{ unit}$
  • B
    $5 \text{ unit}, 4 \text{ unit}$
  • C
    $7 \text{ unit}, 2 \text{ unit}$
  • D
    $8 \text{ unit}, 1 \text{ unit}$

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