A Phred quality Score of $40$ implies a base call accuracy of $\_\_?$Question $4$ Answera$\mathrm{.}1$ error in $100(10^2)$ base calls $-99\%$ base call accuracya. $1$ error in $100(10^2)$ base calls $-99\%$ base call accuracyb$\mathrm{.}1$ error in $10(10^1)$ base calls $-90\%$ base call accuracyb. $1$ error in $10(10^1)$ base calls $-90\%$ base call accuracyc$\mathrm{.}1$ error in $1000(10^3)$ base calls $-99\mathrm{.}9\%$ base call accuracyc. $1$ error in $1000(10^3)$ base calls $-99\mathrm{.}9\%$ base call accuracyd$\mathrm{.}1$ error in $10000(10^4)$ base calls $-99\mathrm{.}99\%$ base call accuracy