Table 71
a Disk-Diffusion Test Using Staphylococcus Gave the Following Results

Multiple Choice

Table 7.1
A disk-diffusion test using Staphylococcus gave the following results:
$$\begin{array} { c c } \text { Disinfectant } & \text { Zone of inhibition } ( \mathrm { mm } ) \\ \text { A } & 0 \\\text { B } & 2.5 \\\text { C } & 10 \\\text { D } & 5\end{array}$$
-In Table 7.1,which compound was bactericidal?

A) A
B) B
C) C
D) D
E) The answer cannot be determined based on the information provided.