23. Let U={ 3,5,7,9,11,12 Let A= 5,7,11,13 Find A^C 3,5,7,9,11,12,13 B.) 3,9,12 C. 5,7,11,13 D. 2,4,6,8

To find the complement of set A, denoted as $A^C$, we need to find all the elements in the universal set U that are not in set A.<br /><br />Given:<br />$U = \{3, 5, 7, 9, 11, 12\}$<br />$A = \{5, 7, 11, 13\}$<br /><br />Step 1: Identify the elements in set A.<br />$A = \{5, 7, 11, 13\}$<br /><br />Step 2: Find the elements in the universal set U that are not in set A.<br />$A^C = U - A = \{3, 9, 12\}$<br /><br />Therefore, the correct answer is B.) $\{3, 9, 12\}$.