Explanation:

Both statements 2&3 are incorrect.

X-ray Polarimeter Satellite(XpoSat)

• XPoSat is designed to study X-ray polarisation in the medium X-ray band, offering insights into celestial sources' radiation mechanisms and geometry. 

• This study is crucial for understanding the physics behind these celestial bodies.

• XPoSat is only the world's second mission dedicated to X-ray polarisation in the medium X-ray band. 

• NASA's Imaging X-ray Polarimetry Explorer (IXPE), launched in 2021, was the first such mission by a space agency.

• Entirely built by two Bengaluru-based institutes—ISRO’s UR Rao Satellite Centre and Raman Research Institute—XPoSat's development began in 2008, with a formal agreement signed with ISRO in 2015. 

Hence option 2nd is correct.