To determine which call number will be first when arranging books in correct order on the shelves, you need to understand how call numbers are structured. Call numbers are typically composed of a combination of letters and numbers, often separated by decimal points.
The most common order for call numbers is to arrange them alphabetically first, and then numerically.
In this case, let's break down each call number:
A. D 839 .G3 1987
B. D 839 .G42 2004
C. DE 82 .A49 2006
D. DA 546 .L74 1986
Looking at the first letter, we see that A is before D. Therefore, option A is not the first call number.
Next, let's compare the second letter. In this case, both options B and D have the second letter as A. To determine which is first, we need to move on to the third letter. In this case, B has the third letter G and D has the third letter L. G comes before L in alphabetical order, so option B is before option D.
Therefore, the correct answer is option B. So, option B (D 839 .G42 2004) will be the first call number when arranging the books in correct order on the shelves.