Physics - Error Question with Solution | TestHub

Least count of vernier calipers $$\begin{array}{rl}& \text{ LC }=1\mathrm{MSD}-1\text{ VSD }\\ & =\frac{\text{ Smallest division on main scale }}{\text{ Number of divisions on vernier scale }}\\ & 20\text{ divisions of vernier scale }\\ & =16\text{ divisions of main scale }\\ & \therefore 1\mathrm{VSD}=\frac{16}{20}\mathrm{mm}=0.8\mathrm{mm}\\ & \therefore \text{ LC }=1\mathrm{MSD}-1\mathrm{VSD}\\ & =1\mathrm{mm}-0.8\mathrm{mm}\\ & \therefore =0.2\mathrm{mm}\\ & \end{array}$$ $\therefore$ The correct option is (d).