According to above given question , we can say that
Some note-books may be paper .
Some stationery may be paper and note-books .

Correct Option: A

According to above given question , we can say that
Some note-books may be paper .
Some stationery may be paper and note-books .
From above it is clear that option ( A ) represents the best relationship between paper, note-books and stationery . As shown in given venn - diagram .

According to above given question , we can say that
BA students are different from BSc students but both of these classes are included in the class of Degree students.

Correct Option: B

According to above given question , we can say that
BA students are different from BSc students but both of these classes are included in the class of Degree students.
From above it is clear that option ( B ) represents the best relationship between Degree students, BA students and BSc students . As shown in given venn - diagram .

From above the given question , we know that
All boys are males.
Some boys and some males may be football players.
Some football players may not be males and vice versa is also possible.

Correct Option: A

From above the given question , we know that
All boys are males.
Some boys and some males may be football players.
Some football players may not be males and vice versa is also possible.
From above it is clear that option ( A ) represents the best relationship between males, boys and football players .

On the basis of above given question , we can say that
some of the participants were vegetarians, some others were non-vegetarians. Another group was of non - vegetarians not eating meat and yet another group of people eating meat but not fish.

Correct Option: B

On the basis of above given question , we can say that
some of the participants were vegetarians, some others were non-vegetarians. Another group was of non - vegetarians not eating meat and yet another group of people eating meat but not fish. It means that vegetarians are different from non - vegetarians .
From above it is clear that option ( B ) will be required answer. As shown in given venn - diagram .

As we know that ,
Sharks belong to class Pisces. Whale is a mammal and Turtle belongs to class reptilian.

Correct Option: C

As we know that ,
Sharks belong to class Pisces. Whale is a mammal and Turtle belongs to class reptilian.
From above it is clear that Sharks, Whales and Turtles belong to different classes.
Hence , Option ( C ) is required answer .