Correct option is A
Statements:
A. Some sharpeners are pencils.
B. Some pencils are mats.

Conclusions:
I. No sharpener is a mat - False - there is not negative statement is given between them.
II. Some mats are pencils - True - some part is common of them.
III. Some mats are sharpeners - False - some part of them are not common.
IV. No pencil is a sharpener - False - there is not negative statement is given between them.
Only II is true
but
in I and III (some + no) relation between two same words will given either II or III be true
so Only II and Either I and III is true.
option a is correct.