One of the roots of the equadratic equation $a x^2+b x+c=0, a \neq 0$ is positive and the other root is negative. The condition for this to happen is

• A

  $a \gt 0, b \gt 0, c \gt 0$
• B

  $a \gt 0, b \lt 0, c \gt 0$
• C

  $a \lt 0, b \gt 0, c \lt 0$
• Correct answer
  D

  $a \lt 0, c \gt 0$

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