Concept:In syllogisms, if all A are B and no B is C, then no A is C.
Explanation:Statement 1: All lamps are hooks. So the set of lamps is completely inside the set of hooks.
Statement 2: No hook is coloured. So the sets of hooks and coloured have no common element.
Since all lamps are inside hooks, no lamp can be in the coloured set.
Thus, "No lamp is coloured" is true (Conclusion II follows).
Conclusion I ("Some lamps are coloured") is false because it contradicts the above.
Answer:Only conclusion II follows.