How many 4-letter words with or without meaning, can be formed out of the letters of the word, 'LOGARITHMS', if repetition of letters is not allowed?	Options:
A) 4787
B) 2876
C) 2876
D) 5040
E) 1082
'LOGARITHMS' contains 10 different letters.   Required number of words = Number of arrangements of 10 letters, taking 4 at a time.   =10P_4   = 5040.   Answer: 5040
<result>D</result>
How many 4-letter words with or without meaning, can be formed out of the letters of the word, 'LOGARITHMS', if repetition of letters is not allowed?