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

Find the word which has a different sound in the underlined part
1. A. skytrain B. hyperloop C. cycling D. friendly
2. A. comfortable B. convenient C. economical D. autopilot
3. A. mine B. driver C. his D. find
4. A. traffic B. same C. crash D. jam
5. A. let B. jet C. vehicle D. success