The correct answer is $\boxed{\text{B}}$.
A tropical year is the time it takes for the Earth to orbit the Sun once, relative to the vernal equinox. It is approximately 365.2422 days long. A sidereal day is the time it takes for the Earth to rotate once on its axis, relative to the fixed stars. It is approximately 23 hours, 56 minutes, and 4.09 seconds long.
Therefore, in a tropical year, there are approximately 365.2422 / 23 hours, 56 minutes, and 4.09 seconds = 365.2224 sidereal days.
Option A is incorrect because it is the number of days in a common year. Option C is incorrect because it is the number of days in a leap year. Option D is incorrect because it is the number of days in a tropical year plus one day.