Explanation:

- Scintillating: This word refers to something that sparkles, shines, or is brilliantly and excitingly clever.

- Option 1: Glittering - This option means shining with a shimmering or sparkling light. It shares a similar sense of brightness and sparkle with "scintillating."

- Option 2: Stinging - This means something that causes a sharp or smarting pain. It does not relate to sparkle or brilliance.

- Option 3: Flattering - This describes something that is complimentary or boosts self-esteem; it does not imply sparkle.

- Option 4: Boring - This is the opposite of sparkling or exciting and is unrelated to the meaning of "scintillating."

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