Consider

1.If all roots are positive then which of the following is true

(A)

(B)

(C)

(D)

2.If roots can take any sign

(A

(B)

(C)

(D)None of these

3.If one root is zero

(a)

(B)

(C)

(d)None of these

4.If all coefficients of the equation are positive then which of the following is true

(A)

(B)

(C)

(d)None of these