Statements:
All tubes are pipes.
All switches are pipes.
All pipes are boards.
Conclusions:
I. All switches are boards.
II. All boards are tubes.
III. Some boards are switches.
Which conclusion(s) logically follow(s)?
Select the option that is related to the fourth term in the same way as the first term is related to the second term and the fifth term is related to the sixth term. 18 : 30 :: ? : 66 :: 54 : 102