Detailed Explanation:

❌ Statement 1 – Incorrect: Budding and grafting are traditional vegetative propagation techniques that multiply plants asexually without altering DNA; no recombinant DNA technology is used, so they do not create transgenic crops.

✅ Statement 2 – Correct: Cytoplasmic male sterility (CMS) can be manipulated through genetic engineering to introduce or transfer sterility genes into crops, creating transgenic lines for hybrid seed production.

✅ Statement 3 – Correct: Gene silencing (RNA interference/RNAi) uses engineered genetic constructs to suppress specific gene expression in plants, making it a key technique for developing transgenic crops with desired traits.