question_answer

If 2 is a root of the equation \[{{x}^{2}}+bx+12=0\] and\[{{x}^{2}}+bx+k\] has equal roots, then k is equal to:

A)  8                                

B)  16

C)  \[-\,8\]                         

D)  \[-\,16\]

E)  None of these