Company A applied for a certain drug in March 2020 and was granted a patent in October. Among the following items, the one that infringes Company A’s patent rights is ().

Answer: D

(1) Option A belongs to "exhaustion of rights", option B belongs to "prior use", and option C belongs to "use for scientific research and experiment", both Does not constitute infringement; (2) Option D: Implementing the patent for production and business purposes without the permission of the patent owner constitutes infringement.