The 3rd option is correct :)
Un dormitorio is a bedroom
Un atico is a penthouse
Una cocina is a kitchen
Un sala de estar is a living room
Using these definitions, un atico is the option that is not typically found in an apartment.
Answer:
Present Tense = pienso
Past Tense = pensé
Imperfect Tense = pensaba
Future Tense = pensaré
Conditional Tense = pensaría
Explanation:
You didn't really specify which tense it has to be, but I'm gonna take a guess that you probably want the present tense one.