The graph between de Broglie wavelength ( $\lambda$ ) and ( $\lambda$ p) is (p is the linear momentum of the particle)

Given data:

The graph between de Broglie wavelength ( $\lambda$ ) and ( $\lambda$ p) 

Formula used:

$\mathrm{\lambda }=\frac{\mathrm{h}}{\mathrm{p}}$

 Detailed solution:

$$\begin{gathered} \mathrm{\lambda }=\frac{\mathrm{h}}{\mathrm{p}} \\ \Rightarrow \mathrm{\lambda p}=\mathrm{h} \\ \mathrm{\lambda p}=\mathrm{const} \\ \mathrm{As} \mathrm{\lambda } \mathrm{changes} ,\mathrm{\lambda p}=\mathrm{const} \end{gathered}$$

Hence , the correct option is B