Sure, let's analyze the pronunciation of the underlined parts in each word to determine which one is pronounced differently.

**Question 1:**
A. rural
B. surprise
C. successful
D. volunteer

- The underlined part in "rural" is "ru".
- The underlined part in "surprise" is "sur".
- The underlined part in "successful" is "suc".
- The underlined part in "volunteer" is "vol".

The word "volunteer" has the underlined part pronounced differently from the others.

**Question 2:**
A. application
B. benefit
C. non-profit
D. narrow-minded

- The underlined part in "application" is "ap".
- The underlined part in "benefit" is "be".
- The underlined part in "non-profit" is "non".
- The underlined part in "narrow-minded" is "nar".

The word "application" has the underlined part pronounced differently from the others.

**Question 3:**
A. reference
B. remote
C. reaction
D. creation

- The underlined part in "reference" is "ref".
- The underlined part in "remote" is "re".
- The underlined part in "reaction" is "re".
- The underlined part in "creation" is "cre".

The word "reference" has the underlined part pronounced differently from the others.

**Question 4:**
A. area
B. market
C. martyr
D. archaeology

- The underlined part in "area" is "ar".
- The underlined part in "market" is "mar".
- The underlined part in "martyr" is "mar".
- The underlined part in "archaeology" is "ar".

The word "market" has the underlined part pronounced differently from the others.

**Question 5:**
A. dedicated
B. demonstrate
C. development
D. delicate

- The underlined part in "dedicated" is "ded".
- The underlined part in "demonstrate" is "dem".
- The underlined part in "development" is "dev".
- The underlined part in "delicate" is "del".

The word "demonstrate" has the underlined part pronounced differently from the others.

So, the answers are:
1. D. volunteer
2. A. application
3. A. reference
4. B. market
5. B. demonstrate