Consider the following statements and choose the correct answer:
1. Preparations of tRNA from plant sources contain cytokinins
2. Cytokinins most likely influence protein synthesis through their involvement in the attachment to tRNA to the ribosome-mRNA complex during protein synthesis
3. The synthetic cytokinins 6-BAP and kinetin influence the production of viruses in certain host systems

A. Only 1 and 2 are true

B. Only 2 and 3 are true

C. Only 1 and 3 are true

D. 1, 2 and 3 are true

Answer: Option D