Three 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:
I. No computer is a marker.
II. All erasers are markers.
III. All pens are erasers.
Conclusions:
I. No pen is a computer:
II. Some erasers are computers.

Statements:
I. No computer is a marker.
II. All erasers are markers.
III. All pens are erasers.​

From the statement following Venn diagram can be –

​Conclusions:
I. No pen is a computer (Follows)

All pens are marker & no marker is computer, so it implies that No pen is a computer.
II. Some erasers are computers. (does not follow)

When all erasers are marker, but no marker is computer, then it implies that some erasers are computers does not follow.

Thus, Option A is the correct answer.