
Correct : a
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``` --- **Explanation of Choices:** * **H1 Heading:** This is the most prominent heading on the page and directly reflects the content, including the exam context and core topic. * **Meta Title:** Concise, includes primary keywords (`Self-Energizing Brake`, `GATE 2016`, `Mechanical Engineering`, `Q22`), and adds the brand name for recognition. * **Meta Description:** Provides a clear summary, highlights the problem-solving nature, includes relevant keywords, and offers a benefit ("Ideal for exam preparation"). * **Meta Keywords:** A comprehensive list including specific exam details, core concepts, and related terms. * **Canonical URL:** Essential for SEO to tell search engines the preferred version of a page, preventing duplicate content issues. * **Open Graph & Twitter Card Tags:** These are crucial for how the link appears when shared on social media platforms, making it more engaging with a clear title, description, and an image.

Correct : a
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