In world history and international relations, the First China War, also known as the First Opium War, was fought between which two countries?

Introduction / Context:
The First China War is a commonly used term for the First Opium War, an important conflict in the nineteenth century that reshaped the relationship between European colonial powers and China. General knowledge and history questions often ask about the main parties involved in such landmark wars. This question therefore checks whether the candidate can correctly identify the two countries that fought the First Opium War.

Given Data / Assumptions:

- The event is called the First China War, also known as the First Opium War. - The options pair China with four different countries: Britain, France, Egypt and Greek. - We need to select the historically correct combination. - No dates or treaty names are required, only the belligerent countries.

Concept / Approach:
The First Opium War took place between 1839 and 1842. It was fought primarily between the Qing dynasty of China and the British Empire over trade disputes, especially the illegal opium trade and issues of sovereignty and diplomatic relations. Therefore, the correct answer must pair China with Britain. Knowledge of other colonial powers in Asia, such as France, helps to eliminate wrong options that do not match this specific conflict.

Step-by-Step Solution:
1. Recall that the term First China War generally refers to the First Opium War. 2. Remember that opium trade between British merchants and China was the major cause of tension. 3. The Qing government attempted to restrict this trade, leading to direct military confrontation. 4. The British Empire used its naval power to force China to sign unequal treaties. 5. Since Britain was the key Western power in this conflict, the correct pair is China and Britain. 6. Therefore, among the options given, China and Britain is the historically accurate combination.

Verification / Alternative check:
A quick verification can be done by remembering the Treaty of Nanjing, which ended the First Opium War and ceded Hong Kong to Britain. This treaty is always mentioned in relation to British influence in China, not French, Egyptian or Greek influence. Many world history timelines explicitly label the years 1839 to 1842 as the First Opium War between China and Britain. Revising these key facts confirms that the China and Britain option is correct beyond doubt.

Why Other Options Are Wrong:
China and France refers more to events such as the later conflicts in Indochina and not to the First Opium War. Egypt was not a colonial power in East Asia and had no role in this specific war, so China and Egypt is incorrect. The term Greek is itself not a proper way to refer to the modern state of Greece in such questions, and Greece was not involved in the First Opium War. Hence all three alternative options are historically wrong for this particular conflict.

Common Pitfalls:
One common mistake is to confuse the First Opium War with later events in Chinese history that involved multiple Western powers, such as the Second Opium War or the Boxer Rebellion. Candidates may see a European country name and select it without recalling which power was active in which event. To avoid this, it is helpful to link each major war with key treaties and concessions, such as China and Britain for the First Opium War and the Treaty of Nanjing. This structured recall prevents mixing up the roles of Britain and France in different parts of Asia.

Final Answer:
The First China War, also called the First Opium War, was fought between China and Britain.