Consider the following statements :
1. Micro RNA (miRNA) is an exogenous double-stranded RNA uptaken by cells, while small interfering RNA (siRNA) is an endogenous single-stranded RNA.
2. miRNA mainly serves as a drug target, therapeutic agent and biomarker tool while siRNA mainly serves as a therapeutic agent.
Which of the following statements given above is/are correct?
1
1 only
2
2 only
3
Both 1 and 2
4
Neither 1 nor 2