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?

How many 4-letter words with or without meaning, can be formed out of

1.	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?
A.	40
B.	400
C.	5040
D.	2520
Answer» D. 2520