If the vectors, \(\overrightarrow{\mathrm{p}}=(a+1) \hat{\mathrm{i}}+a \hat{\mathrm{j}}+a \hat{\mathrm{k}}\)  ; \(\overrightarrow{\mathrm{q}}=\mathrm{a} \hat{\mathrm{i}}+(\mathrm{a}+1) \hat{\mathrm{j}}+\mathrm{a} \hat{\mathrm{k}}\) and  \(\overrightarrow{\mathrm{r}}=\mathrm{a} \hat{\mathrm{i}}+\mathrm{a} \hat{\mathrm{j}}+(\mathrm{a}+1) \hat{\mathrm{k}}(\mathrm{a} \in \mathrm{R})\) are coplanar and \(3(\overrightarrow{\mathrm{p}} \cdot \overrightarrow{\mathrm{q}})^{2}-\lambda|\overrightarrow{\mathrm{r}} \times \overrightarrow{\mathrm{q}}|^{2}=0,\) then the value of \(\lambda\) is

1. A \(0.5\)
2. B \(1\)
3. C \(1.5\)
4. D \(2\)