Correct Answer: (d) Neptune
Note: Generally, Pluto is considered as the farthest planet from the Sun. As its orbit lies inside the orbit of Neptune, some times Neptune becomes the farthest planet from Sun. Neptune was farthest from 1979 to 1999 but from 11th February, 1999. Pluto will be the farthest planet for the next 228 years. Hence, it can be seen that some time Pluto and some time Neptune becomes the farthest planet from Sun. As in 2006, Pluto was declared a dwarf planet, hence now Neptune is the correct answer for this question.
