Match the columns. ( Column-I Column-II A. Backlash error P. Always...

- A. Backlash error $→$ (S) Backlash happens due to loose fittings in the screw gauge. - B. Zero error ($\rightarrow(\mathrm{P}, \mathrm{R})$) Zero error is always subtracted (P), and it may be positive or negative (R). - C. Vernier callipers $→$ (Q) Their least count is given by (1 $\mathrm{MSD}-$1 $\mathrm{VSD}$). - D. Error in screw gauge ($\rightarrow(\mathrm{R}, \mathrm{S})$) Screw gauge can have zero error (positive or negative $→ R$) and backlash due to loose fittings ($S$).