For question 4, the word with a different stress pattern is **B. lucky**. The other words (realize and invitation) have stress on the second syllable, while "lucky" has stress on the first syllable.

For question 5, the word with a different stress pattern is **C. conditioner**. The other words (unsuccessful, provide, recommended) have stress usually on the second syllable, while "conditioner" has stress on the third syllable.