Consider the following with regard to eccentricity $(e)$ of a conic section : $\square$ 1. $e=0$ for circle 2. $e=1$ for parabola 3. $e \lt 1$ for ellipse Which of the above are correct?

• A

  $1$ and $2$ only
• B

  $2$ and $3$ only
• C

  $1$ and $3$ only
• Correct answer
  D

  $1$, $2$ and $3$

Hence, the correct answer is option: 'D'.