Question

Which of the following is a correct set of strings that contain unique letters only?

A) {"apple", "banana", "orange"}
B) {"dog", "cat", "rabbit"}
C) {"book", "pen", "paper"}
D) {"car", "bus", "train"}

Answer 1

The correct set of strings with unique letters is Option B: {"dog", "cat", "rabbit"}. Each string in this set contains letters that do not repeat within that string.

Step-by-step explanation:

The question at hand is asking which set of strings contains unique letters only, meaning each string must be composed of letters that do not repeat within that string. To determine the correct answer, we simply examine each string within the sets given in the options.

• Option A: {"apple", "banana", "orange"} fails because 'apple' and 'banana' contain repeated letters ('p' in 'apple' and 'a' in 'banana').
• Option B: {"dog", "cat", "rabbit"} is the correct set where each string has unique letters with no repetition within any word.
• Option C: {"book", "pen", "paper"} fails due to the repeat of 'o' in 'book' and 'p' in 'paper'.
• Option D: {"car", "bus", "train"} also contains unique letters in each string but not as an entire set.

Therefore, the correct answer is Option B: {"dog", "cat", "rabbit"}.