Which of the following statements is true?

(A).By Section 2 (j) of Indian Patent act, 1970 "Invention" means a new product or process involving an inventive step and capable of industrial application.

(B). A fictional construct known as a person having ordinary skill in the art (PHOSITA), a person of ordinary skill in the art (POSITA or PSITA), or simply a skilled person, is commonly referenced in patent laws across various jurisdictions.

(C).  Inventions lacking a serious purpose or that claim to defy well-established natural laws, such as perpetual motion machines can be deemed eligible for patent protection

(D).  Substances obtained through mere admixture, which merely aggregate the properties of their components, or processes for their production can be deemed ineligible for patent protection