What patents can be granted?

Answer: d

(1) Option A: No patent right shall be granted for inventions and creations that violate laws, social ethics or hinder public interests; (2) Option B: Rules and methods of intellectual activities, and no patent right is granted; (3) Option C: Diagnosis and treatment of diseases, no patent right granted; (4) Option D: Animal and plant varieties, no patent right granted; However, the production methods of animal and plant varieties can be granted patent rights in accordance with the provisions of the patent law.