Find the missing group of letters in the following series:
$\mathrm{BC}, \mathrm{FGH}, \mathrm{LMNO}$_____________
(A) UVWXY
(B) TUVWX
(C) STUVW
(D) RSTUV
Find the missing group of letters in the following series:
$\mathrm{BC}, \mathrm{FGH}, \mathrm{LMNO}$_____________
(A) UVWXY
(B) TUVWX
(C) STUVW
(D) RSTUV