Which of the following is/are used in recombinant DNA technology? (i) Agarose gel (ii) Ethidium bromide (iii) Plasmid vector (iv) Restriction endonuclease

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