Quiz of the Fortnight—April 15 (2025)

1) Planet K2-18b

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1. has reported strong signals of dimethyl sulphide (DMS) and dimethyl disulphide (DMDS), the gases detected outside the solar system for the first time.
2. was discovered in 2010 by the Kepler satellite during its K2 mission phase.
3. is a super-Earth exoplanet that orbits an M-type star.
4. takes 32.9 days to complete one orbit of its star, and is 0.1429 astronomical unit (AU) from its star.

How many of the statements given above are correct?