Let $a$, b, and c be real numbers such that $4\mathrm{a}+2\mathrm{b}+\mathrm{c}=0$ and $ab>0$. Then the equation $a{\mathrm{x}}^2+\mathrm{bx}+\mathrm{c}=0$ as

• A

  complex roots

• B

  exactly one root

• C

  real roots

• D

  none of these