Find the word which have a different sound in the underlined part

B. EXERCISE
 I. LEXICAL AND GRAMMAR 
I. Find the word which have a different sound in the underlined part.
1. A. wireless               
B. drip                   
C. picture                       
D. rubbish
 
2. A. thirsty 
B. throw 
C. theme 
D. there
 
3. A. fear                
B. repeat                   
C. idea                        
D. really
 
 4. A. lamp B. play C. stay D. crazy
5. A. cave B. famous C. late D. channel