Best of luck - KCLFTSB
If we read it backwards BSTFLCK
Good wishes SHSWDG
If we read it backwards GDWSHS
Similarly, for "Ace the exam" it should be "MXHTC" which when read backward "CTHXM"
Answer (B) MXHTC
Edit: added by Sonam Vyas
Just remove the vowels and read from backward to get the answer 😎