Here is the completely updated `question.php`. I added the missing `$breadcrumbs` array and defined `$category_name` and `$topic_name` right before the header is included. This ensures that `header.php` generates the correct Breadcrumb Schema, page title, and meta description for single question pages. Replace your entire `question.php` with this: ```php World War I Questions
TestMaster MCQs

World War I Questions

Home General Knowledge World War I
Q. The assassination of Archduke Franz Ferdinand in 1914 took place in which city?
Sarajevo
Belgrade
Vienna
Budapest

Explanation:

The assassination took place in Sarajevo, Bosnia-Herzegovina.

Q. Which country was NOT a member of the Central Powers in World War I?
Germany
United States
Ottoman Empire
Austria-Hungary

Explanation:

The United States joined the Allied Powers in 1917.

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