The statements below are followed by two conclusions labeled I, II, III and IV. Assuming that the information in the  statements is true, even if it appears to be at variance with generally established facts, decide which conclusion(s) logically and definitely follow(s) from the information given in the statements.
Statements:
I. No tube light is bulb.
II. All bulbs are lamps.
Conclusions:
I. No tube light is lamp.
II. No lamp is tube light.
III. Some lamps are bulbs.
IV. All the lamps are bulbs.