A sphere is rolling without slipping on a fixed horizontal plane surface. In the figure, A is the point of contact, B is the center of the sphere and C is its topmost point. Then

Assuming positive x-direction along the moving direction 

${\mathrm{V}}_{\mathrm{A}}=0,{\mathrm{V}}_{\mathrm{B}}=\mathrm{\omega r},{\mathrm{V}}_{\mathrm{C}}=2\mathrm{\omega r}$ all are along the moving direction of the sphere 

Here $\overrightarrow{{\mathrm{V}}_{\mathrm{C}}}-\overrightarrow{{\mathrm{V}}_{\mathrm{B}}}=\overrightarrow{{\mathrm{V}}_{\mathrm{B}}}-\overrightarrow{{\mathrm{V}}_{\mathrm{A}}}$

$\overrightarrow{{\mathrm{V}}_{\mathrm{C}}}-\overrightarrow{{\mathrm{V}}_{\mathrm{A}}}$ is towards the right and  $\overrightarrow{{\mathrm{V}}_{\mathrm{B}}}-\overrightarrow{{\mathrm{V}}_{\mathrm{C}}}$ is towards left.

Hence,${\overrightarrow{\mathrm{V}}}_{\mathrm{C}}-{\overrightarrow{\mathrm{V}}}_{\mathrm{A}}=2\left({\overrightarrow{\mathrm{V}}}_{\mathrm{B}}-{\overrightarrow{\mathrm{V}}}_{\mathrm{C}}\right)$ is incorrect

But considering the magnitude, $\left|{\overrightarrow{V}}_{\mathrm{C}}-{\overrightarrow{\mathrm{V}}}_{\mathrm{A}}\right|=2\left|{\overrightarrow{\mathrm{V}}}_{\mathrm{B}}-{\overrightarrow{\mathrm{V}}}_{\mathrm{C}}\right|$ is correct

${\mathrm{V}}_{\mathrm{C}}-{\mathrm{V}}_{\mathrm{A}}=2\mathrm{\omega r}=2{\mathrm{V}}_{\mathrm{B}}$