The most suitable reagent for the following conversion, is:

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🧠 The "Aha!" Moment
In organic synthesis, the geometry of the double bond (cis vs trans) is everything. When reducing an alkyne, you have a choice: the "Natural" cis-alkene or the "Forced" trans-alkene.

🗺️ The Lindlar Route
1. The Catalyst: Reducing an alkyne (like ) using Hydrogen gas over a specialized palladium catalyst "poisoned" with quinoline or lead salts. This is known as Lindlar's Catalyst.
2. The Mechanism: Lindlar's catalyst performs Syn-addition of Hydrogen. 
3. The Result: Both

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