Which of the following statements is true?

(A). A catalog can be arranged alphabetically or in a classified sequence while as An index is always arranged alphabetically. 

(B).  A Catalog is Used frequently while a Shelf list is used usually at the time of book selection and stock verification.

(C). A Catalog is extensively used and brings all the like subjects together while a Bibliography shows date-wise collections.

(D).  A Catalog is generally found  in card, register, and computerized form while as Bibliography is Usually found in the form of a book