Let's analyze the options: - In options 1, 2, and 4, the first two letters in each set follow a simple alphabetical sequence with a pattern of alternating capital and lowercase letters (e.g., "aB", "bC", "tU"). - However, in option 3 ("pQ TU yz"), the first two letters "pQ" are in lowercase, and the next letters are "TU", which are both uppercase, creating a break in the pattern. Thus, pQ TU yz is the odd one out. Therefore, the correct answer is 3 . Quick Tip When identifying the odd one out, look for patterns or consistency in formatting or alphabetical sequences.