Step 1: Understanding the Concept
Dictionary order is determined by comparing letters of the words from left to right alphabetically.
Step 2: Detailed Explanation
All words start with 'F' and 'a' (except Follow, which starts with 'Fo').
1. Compare Faithfully, Fallible, False, Falter:
- Third letter: 'i' (Faithfully) comes first.
- Remaining: Fallible, False, Falter. All have 'l' as the third letter.
2. Compare Fallible, False, Falter:
- Fourth letter: 'l' (Fallible), 's' (False), 't' (Falter).
- 'l' comes before 's' and 't'. So, Fallible is the second word.
3. Compare False and Falter:
- Fourth letter: 's' (False) comes before 't' (Falter). So, False is the third word.
Wait, let's re-list carefully:
1. Faithfully (F-a-i)
2. Fallible (F-a-l-l)
3. False (F-a-l-s)
4. Falter (F-a-l-t)
5. Follow (F-o)
Step 3: Final Answer
The word that comes third is (B) False.