$\rightarrow$ Here the most accurate player will be the one who makes the highest score.
$\rightarrow$ $Q$ has the maximum score of $46$ points among all other players. So $Q$ is the most accurate player.
$\rightarrow$ Consistency for a series of data should mean their Standard Deviation is minimum. Standard deviation is given by the square root of the sum of the squares of the individual deviations from mean divided by the number of items. Here, mean values for $P,Q,R$ and $S$ are $\frac{33}{7}=4.71,\frac{46}{7}=6.57,\frac{20}{7}=2.85$ and $\frac{29}{7}=4.14$ respectively.
- For $P$ the standard deviation is $\sqrt{\frac{3 \times 3.71^2 + 2 \times 0.29^2 + 2\times 5.29^2}{7}} = 3.73$
- For $Q$ the standard deviation is $\sqrt{\frac{1 \times 5.57^2 + 3 \times 1.57^2 + 3\times 3.43^2}{7}}=3.24$
- For $R$ the standard deviation is $\sqrt{\frac{5 \times 1.85^2 + 1 \times 2.15^2 + 1\times 7.15^2}{7}}=3.22$
- For $S$ the standard deviation is $\sqrt{\frac{4 \times 3.14^2 + 1 \times 0.86^2 + 2\times 5.86^2}{7}}=3.93$
$\rightarrow$ The most consistent player will be the one who has the minimum standard deviation.
$\rightarrow$ $R$ has the minimum standard deviation and is the most consistent.
$\therefore$ Option $B$ is the right answer.
NOTE:- For calculating Standard deviation https://www.mathsisfun.com/data/standard-deviation-formulas.html.