NEET Biology question

Which of the following statements are correct? 1. Ti plasmid of Agrobacterium tumefaciens is used to deliver the desirable gene into plant cells. 2. HindII always cuts DNA molecules at a particular point by recognizing a specific sequence of six base pairs. 3. Separated DNA fragments cannot be visualized without staining on an agarose gel electrophoresis. 4. 'Ori' is the sequence responsible for controlling the copy number. 5. DNA is a positively charged molecule.

• (A)(i), (iii) and (v)
• (B)(i), (ii), (iii) and (iv)Correct
• (C)(iii), (iv) and (v)
• (D)(i), (ii), (iii), (iv) and (v)