What is a mixture of potassium nitrate, powdered charcoal and sulphur called

Options :
  1. glass
  2. cement
  3. paint
  4. gun powder
Answer and Explanation :-

Answer: Option 4

Explanation:

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She did not need to fold into herself and self-destruct. Those awful things are survivable, because we are as indestructible as we believe ourselves to be. When adults say, "Teenagers think the hate invincible," with that sly, stupid smile on their faces, they don't know how right they are. We need never be hopeless, because we can never be irreparably broken.
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