The possible venn diagram for the above statements is as follows:
For conclusions: I. No stick is ball → False (No stick is ball is a possibility but not definite) II. No ball is a stick → False (No ball is a stick is a possibility but not definite) III. Some ball are buns → True (All buns are balls is given. Therefore, some balls are definitely buns) IV. All the balls are buns → False (All balls are buns is a possibility but not definite) Hence, Only conclusion III follows is the correct answer.