Haryana Police Constable Model Paper 2

Given series: Left side T H I S K D O W P A N E C M X U Z R B Right side
$6^{\mathrm{th}}$ letter from the left side = D
${12}^{\mathrm{th}}$ letter from the right side of D
As here both direction are used left and right so we can solve it as
$6^{\mathrm{th}}$ letter from the left + ${12}^{\mathrm{th}}$ letter to the right of 6th letter = 18th letter from left
(here total nineteen letters are there so we can count 2nd from the right also)
So ${18}^{\mathrm{th}}$ letter from the left or $2^{\mathrm{nd}}$ from the right end will be R.
Hence, R is the correct answer.