In an ideal Continuous Stirred Tank Reactor (CSTR) at steady state:

Select an option to attempt

1. A
   All particles have the same residence time.
2. B
   Particles which enter the reactor earlier have a higher probability of leaving than those that enter later.
3. C
   Particles which enter the reactor later have a higher probability of leaving than those that enter earlier.
4. D
   All the particles have equal probability of leaving, independent of their time of entry into the reactor.