The right to apply for a patent and the patent right can be transferred, but the transfer of the right to apply for a patent or the patent right to a foreigner must be approved by the relevant competent department of the State Council. Where the right to apply for a patent or the patent right is assigned, the assignor and the assignee shall conclude a written contract, which shall be registered and announced by the patent administration department of the State Council. The patentee has the right to indicate the patent mark or patent number on his patented product or the packaging of the product. The term of patent right for utility model and design is 10 year. The transfer of the right to apply for a patent or the patent right shall take effect from the date of registration. So option a is wrong.