According to the textbook:

• Statement A is correct: Auxins induce parthenocarpy, for example in tomatoes .
• Statement B is correct: Plant Growth Regulators (PGRs) are divided into two groups: growth promoters (e.g., auxins, gibberellins, cytokinins) and growth inhibitors (e.g., abscisic acid) .
• Statement C is correct: Differentiated cells must first regain the capacity to divide (dedifferentiation) to form meristems (like cork cambium), which then produce cells that mature again (redifferentiation) .
• Statement D is incorrect: Abscisic acid (ABA) is primarily a plant growth inhibitor and an inhibitor of plant metabolism, often called the 'stress hormone' .