Understanding the Options
When analyzing the roles of the given options, it's essential to understand their functions and the context in which they operate.

Roles of the Options
- Governor: The Governor is the constitutional head of a state in India, appointed by the President. This role involves overseeing the functioning of the state government and ensuring that laws are executed properly.
- Ambassador: An Ambassador represents a country in a foreign nation, functioning as a diplomatic envoy. Their primary role is to maintain international relations and protect their country's interests abroad.
- Member of Parliament (MP): An MP is an elected representative in the Parliament of India, responsible for making laws and representing the interests of their constituents. They serve at the national level and are involved in legislative processes.
- Lt. Governor: The Lieutenant Governor is appointed to govern Union Territories in India, similar to a Governor of a state. Their responsibilities are akin to those of a state Governor, focused on administration and governance.

Identifying the Odd One Out
The key distinction lies in the **election vs. appointment** aspect:
- The Governor, Ambassador, and Lt. Governor are appointed positions.
- In contrast, a **Member of Parliament is elected** by the public to represent their interests.

Conclusion
Based on the nature of their roles and how they come into office, the odd one out is **option C: Member of Parliament**. This distinction highlights the difference between appointed officials and those elected by the populace, making the MP unique among the choices given.