Out of the following options
Option 1. 4800
4800 has 8 in its 100s place so it is rounded up to 5000.
Option 2. 3875
3875 has 8 in its 100s place , as 8>5 so the number is rounded up to 4000.
Also, looking on the number line, 3875 is closer to 4000 than to 3000 .