This question involves the analysis of a reaction mechanism to determine the elimination product. Let's break down the problem step-by-step:

1. **Identify the Reaction Conditions and Reagents:**
   • The reaction given involves carbon monoxide (CO) at 35 bar and a temperature of 453 K.
   • The starting complex is a Rhodium complex with iodide (I) and carbonyl (CO) ligands.
2. **Understand the Likely Reaction Mechanism:**
   • The given conditions suggest a process involving CO insertion or ligand substitution/elimination.
   • Rhodium complexes often participate in reactions, such as oxidative addition, reductive elimination, or migratory insertion.
3. **Analyze the Potential Products:**
   • The elimination process here likely involves replacing or eliminating a ligand from the Rhodium complex.
   • Among the options given:
     • \(I_2\): Unlikely, as iodine is bonded directly to Rh.
     • \(CH_3I\): There is no direct CH₃ group that would form this product.
     • \(CH_3COI\): Involves the elimination of a single CH₃CO group, likely forming by substitution or migration.
     • \(I_3^−\): Involves three iodine atoms, which doesn't fit the elimination context here.
4. **Conclusion:**
   • The most plausible elimination product, considering the CO and reaction conditions, is \(CH_3COI\), where the carbonyl group eliminates as an acyl iodide.

Therefore, the correct answer is \(CH_3COI\).