SSC JE Mechanical Engineering 2017 Set 2 Solved Paper

This question is based on the sequence of letters of the English alphabet.
VD ⇒‘ V’, 4th from the back and ‘D’, 4th from the front.
ZA ⇒ ‘Z’, 1stfrom the back and ‘D’,1st from the front.
XC ⇒ ‘X’,3rd from the back and ‘C’ 3rd from the front.
While in ‘By’,‘B’ 2nd from the front and ‘Y’, 2nd from the back.These options are different from other options.