निम्नलिखित में से कौन सा विकल्प सेल-फ्री डीएनए (cfDNA) को सबसे अच्छी तरह परिभाषित करता है?

Consider the following pairs regarding root modifications, their key features, and associated plants: I. Prop roots: Originate from branches and grow vertically downward to provide mechanical support - Banyan II. Stilt roots: Develop from lower nodes of the stem and help in anchorage - Sugarcane III. Climbing roots: Arise from nodes and help the plant attach to external support - Black Pepper IV. Clinging roots: Penetrate surface irregularities to secure the plant - Orchids In how many of the above rows is the information correctly matched?

With reference to biomolecules and their functions in living organisms, consider the following statements: I. Certain polysaccharides act as reserve food materials, for example, starch in plants and glycogen in animals. II. Enzymes involved in metabolic reactions are predominantly globular proteins rather than fibrous in nature. III. Symbiotic microorganisms present in the human intestine are known to synthesise some vitamins, including vitamin B-complex and vitamin K. Which of the statements given above are correct?