Q. Consider the following matches of space probes and their target study area:
  1. Rosetta - Comet
  2. New Horizons - Pluto and Kuiper belt
  3. Dawn - Asteroid Belt
Which of the above is / are correct?

Answer: 1, 2 & 3
Notes: All of the matches of space probes and their target study areas are correct:
  1. Rosetta - Comet: The European Space Agency's Rosetta mission was launched in 2004 with the primary objective of studying Comet 67P/Churyumov-Gerasimenko. The spacecraft successfully orbited the comet and deployed the Philae lander to its surface in 2014.
  2. New Horizons - Pluto and Kuiper Belt: NASA's New Horizons mission was launched in 2006 to study Pluto and its moons. After its successful flyby of Pluto in 2015, the spacecraft continued its journey into the Kuiper Belt, where it conducted a flyby of the Kuiper Belt object Arrokoth (also known as Ultima Thule) on January 1, 2019.
  3. Dawn - Asteroid Belt: NASA's Dawn mission was launched in 2007 to study two large asteroids in the asteroid belt between Mars and Jupiter. The spacecraft orbited and studied Vesta, the second-largest object in the asteroid belt, from 2011 to 2012. After completing its mission at Vesta, Dawn moved on to the dwarf planet Ceres, where it orbited and studied it from 2015 to 2018.
So, all three matches are correct.