The correct answer is option 'B' - Parliament.

Explanation:

Parliament, as the legislative body of a country, has the power to remove the president from office in certain circumstances. This process is commonly known as impeachment or removal through a vote of no confidence.

Here is a detailed explanation of how the removal of a president by Parliament works:

1. Impeachment Process:
- In some countries, Parliament has the authority to impeach the president. Impeachment is a formal process where the president is charged with "high crimes and misdemeanors."
- The specific grounds for impeachment may vary depending on the country's constitution and legal framework. Typically, it includes serious misconduct, abuse of power, or violation of the constitution.
- The impeachment process usually begins with a resolution or motion introduced in Parliament outlining the charges against the president. This is followed by an investigation or trial to gather evidence and determine whether the president should be removed from office.
- The trial is often conducted by a special committee or a group of lawmakers appointed for this purpose. The president is given an opportunity to defend themselves and present evidence in their favor.
- After the trial, a vote is taken in Parliament to decide whether to remove the president from office. The required majority for removal may vary, but it is usually higher than a simple majority to ensure a fair and thorough process.

2. Vote of No Confidence:
- In some parliamentary systems, Parliament can remove the president through a vote of no confidence. This mechanism allows Parliament to express its lack of confidence in the president's ability to govern effectively.
- A vote of no confidence is usually initiated by a member of Parliament or a political party. If the motion is supported by a majority of lawmakers, it indicates that Parliament no longer supports the president's leadership.
- Once a vote of no confidence is passed, the president is typically required to resign from office. If the president refuses to resign, it may trigger a constitutional crisis or further political actions to ensure their removal.

3. Role of MPs and Parliamentarians:
- Members of Parliament (MPs) and parliamentarians play a crucial role in the process of removing a president from office.
- They have the power to initiate impeachment proceedings, introduce motions of no confidence, and participate in the investigation or trial against the president.
- MPs vote on the final decision to remove the president, reflecting the will of the people they represent.

In conclusion, Parliament has the authority to remove a president from office through impeachment or a vote of no confidence. This power is vested in the legislative body to ensure accountability and uphold the democratic principles of checks and balances.