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					 Fill the empty place with correct letters in given letter series.
 L U _ T U P L U B T U _ L U B T _ P _ U B T U P
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                        - BPUL
- BUPL
- LBPU
- PBUL
 
Correct Option: A
The given letter series is in a pattern L U B T U P.
After filling the correct letter,we will get the below letters series.
L U B T U P/ L U B T U P/ L U B T U P /  L U B T U P
 
	