Explain radioactivity with the help of a Serge chart

Which of these conditions most likely produces an unstable isotope?

Which of the following is true about a carbonated soft drink? . the carbon dioxide is the solvent, and water is the solute.. the water is the solution, and carbon dioxide is the solvent.. the carbon dioxide is the solution, and the water is the solvent.. the water is the solvent, and the carbon dioxide is the solute.. .

Which statement best describes the function of enzymes?