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निम्नलिखित में से कौन सा विकल्प इस पाठ को पूरा करता है ताकि यह मानक अंग्रेजी के व्याकरण नियमों के अनुकूल हो? Obsidian is a kind of volcanic glass formed when lava cools so quickly that the atoms inside it cannot arrange themselves in a crystalline structure. You ______ more about obsidian's structure, which is classified as amorphous, in a later chapter.