Two statements are given followed by two conclusions. You have to consider the statements to be true even if they seem to be at variance from the commonly known facts. You have to decide which of the given conclusions, if any follow from the given statements.

Statements:
No Bulb is a tube
Some tubes are rods
No rod is switch

Conclusion:
I. Some tubes are not switch
II. No bulb is a switch

Only conclusion I follow

Conclusion:

I : correct

II : As no information about bulb and switch given in the question, therefore this conclusion is incorrect.

Thus, Only conclusion I is follows