The equation $7x^{7}+14x^{6}+12x^{5}+3x^{4}+12x^{3}+10x^{2}+5x+7=0$ has

GATE · 1987 · CS · Question 1 subparts

1. A.

   All complex roots

2. B.

   At least one real root

3. C.

   Four pairs of imaginary roots

4. D.

   None of the above