Correct option is C
Given:
Statements:
I. Some guavas are mangos.
II. All mangos are pears.
III. Some pears are grapes.
From the given information Venn diagram will be:

Conclusions:
I. Some guavas are grapes (Not follow, There is no any relation between guavas and grapes that's why it is not following.
II. Some guavas are pears (Follow, There is a relation between guavas and pears that's why it is following.
III. Some mangos are grapes (Not follow, There is no any relation between mangoes and grapes that's why it is not following.
Thus, the correct option is (c) Only conclusion II follows.