Form pairs
‘A’ Groups
(i) X-rays
(ii) Optical Telescope
(iii) Indian radio telescope
(iv) Launching artificial satellites
‘B’ Groups(a) GMRT(b) ISRO(c) Hubble(d) Chandra
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"From the given pairs of the question can be rearranged as:
i) X-ray - Chandra - it was previously known as advanced astrophysics facility as an X-ray observatory.
ii) Optical telescope - Hubble's space telescope and has an inbuilt Optical Telescope assembly system.
iii) Indian radio telescope - GMRT (Giant Metrewave Radio Telescope).
iv) Launching artificial satellites - ISRO is an expansion for Indian Space Research Organisation."
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