Let's identify the odd one out for each of the groups you provided:

**9. A.on B.by C.in D.get**
- The odd one out is **D.get**. The other options (on, by, in) are prepositions, while "get" is a verb.

**10. A.my B.she C.her D.his**
- The odd one out is **B.she**. The other options (my, her, his) are possessive pronouns/adjectives, while "she" is a subject pronoun.

**11. A.centre B.bus C.car D.bike**
- The odd one out is **A.centre**. The other options (bus, car, bike) are types of vehicles, while "centre" is a place.

**12. A.We B.They C.She D.His**
- The odd one out is **D.His**. The other options (We, They, She) are subject pronouns, while "his" is a possessive pronoun.

If you have more questions or need further explanations, feel free to ask!