Two statements are given, followed by tw...

Two statements are given, followed by two conclusions numbered I and II. Assuming the statements to be true, even if they seem to be at variance with commonly known facts, decide which of the conclusions logically follow(s) from the statements.
Statements:
All heads are tails.
All tails are bones.
Conclusions:
I. All bones are heads.
II. All heads are bones.

Only conclusion I follows.

Both conclusions I and Il follow.

Only conclusion II follows.

Neither conclusion I nor II follows.

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