Fruits, Apples and Oranges

As we know that ,
Humans come under the class Animals.
Birds come under the class Aves.
From above it is clear that option ( C ) represents the best relationship between Humans, Birds and Animals.

As per the given above question , we know that
Catholics and Pope belong to Christians, but Pope belongs to both Catholics and Christians .
It is clear that option ( B ) represents the best relationship between Christians, Catholics and Pope.

As we know that ,
Vegetables and Potatoes are Eatables items .
Eatables will be a big circle and Potatoes will be a small circle .
Therefore ,option ( A ) represents the best relationship between Vegetables, Potatoes and Eatables. As shown in given venn - diagram .

As we know that ,
Land animals are different from sea animals, but both are included in the class Animals.
From above it is clear that option ( B ) represents the best relationship between Animals, land animals and sea animals. As shown in given venn - diagram .

On the basis of above given question , we know that
Some students may be scholars and vice-versa.
Some teachers may be scholars and vice-versa.
Some students may be teachers and vice-versa.
Some students who are scholars may be teachers.
Hence , option ( A ) represents the best relationship between Teachers, Scholars and Students. As shown in given venn - diagram .

As we know that ,
Some teachers may be painters and vice-versa.
Some teachers may be dramatists and vice-versa.
Some painters may be dramatists and vice-versa.
Some teachers who are painters may be dramatists.
It is clear that option ( D ) represents the best relationship between Teacher, Painter and Dramatist.

On the basis of above given question , we can say that
Some lecturers may be doctors and vice-versa.
Some Government servants may be lecturers and vice-versa.
Some Government servants may be doctors and vice-versa.
Some Government servants who are lecturers may be doctors.
Some doctors who are lecturers may be Government servants.
Therefore , option ( D ) represents the best relationship between Government Servants, Lecturers and Doctors. As shown in given venn - diagram .

As per the given above question , we can say that
Some children may be serious.
Some children may be naughty.
Naughty is different serious.
From above it is clear that option ( A ) represents the best relationship between Children, Serious and Naughty. As shown in given venn - diagram .

As we know that ,
MK Gandhi, Umesh Chandra Bandopadhyay, Jatin Das and Surya Sen, are different persons.
From above it is clear that option ( B ) represents the best relationship between M .K. Gandhi, Umesh Chandra Bandhopadhyay, Jatin Das and Surya Sen. As shown in given venn - diagram .

As per the given above question , we know that
Some black eyed people may be brown haired and vice-versa.
Some black eyed people may be Indians and vice-versa.
Some brown haired people may be Indians and vice-versa.
Some black eyed and brown haired people may be Indians and vice?versa.
Therefore , option ( A ) will be correct .