How many words can be formed by using all the letters of the word, 'ALLAHABAD' ?  Choose the correct answer:
A) 3780
B) 1890
C) 7560
D) 2520
E) 5420
The word 'ALLAHABAD' contains 9 letters, namely 4A, 2L, 1H, 1B and 1D.   Requisite number of words =9!/(4!)(2!)(1!)(1!)(1!) =7560   Answer is 7560
<result>C</result>
How many words can be formed by using all the letters of the word, 'ALLAHABAD' ?