The distance of the plane $\overline{\mathrm{r}}=(\hat{\mathrm{i}}-\hat{\mathrm{j}})+\lambda(\hat{\mathrm{i}}+\hat{\mathrm{j}}+\hat{\mathrm{k}})+\mu(\hat{\mathrm{i}}-2 \hat{\mathrm{j}}+3 \hat{\mathrm{k}})$ from the origin is
- A$\frac{7}{\sqrt{38}}$ units
- B$\frac{1}{\sqrt{38}}$ units
- C$\frac{5}{\sqrt{38}}$ units
- D$\frac{2}{\sqrt{38}}$ units
✓ Correct answer: A
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