In many of its satellite launches, the Indian Space Research Organisation (ISRO) sends "sounding rockets" to space due to some of their inherent advantages. Consider the following statements with this reference:
- Sounding rockets are relatively cheap and fast way of research in upper atmospheric region
- They can be used to test or prove prototypes of new components or subsystems intended for use in launch vehicles and satellites.
- Rohini is a series of sounding rockets developed by ISRO
Which of the above is / are correct statements?