Which kind of flower (flowers are) is best to be grown up in the apartments?

Question:

Answers:
it depends on your apartment: how much light is there, what temperature, humidity, south-oriented or not. and then it depends on your skills.
if you want plants that blossom try: spatiphyllum (quite easy), anthurium (more difficult to keep), kalanchoe, phalenopsis (an orchid, but one of the easiest to grow), schlumberger (echinopsis knotti), cyclamen (needs cool enviroment) or simply cactus (they too blossom).