The letters of the word CALCULUS are permuted in all possible ways . Then the number of words in which - A) 2C's are separated is 3780 B) 2C's and 2L's are separated is 2880 C) 2C's are separated but 2L's are together is 900 D) 2C's and 2L's are together is 360 . ( More than one choice can be correct)