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Some dens are rooms. All rooms are walls. Some walls are bricks, all bricks are plates.

(a) Some plates are walls

(b) Some walls are dens

(c) Some bricks are rooms

(d) Some plates are rooms

Solution

Correct Option: 3

All bricks are plates, so some plates are walls (via bricks being walls and bricks being plates) - statement (a) follows. Some dens are rooms and all rooms are walls, so some walls are dens - statement (b) follows. Statements (c) and (d) do not definitively follow.

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