Which one of the following diagrams best depicts the relationship among Days, Year and Months.

As we know that ,
Cement is different from Bricks, but both are building materials.
From above it is clear that option ( D ) represents the best relationship between Cement, Bricks and Building materials . As shown in given venn - diagram .

According to above question , we can say that
Some illiterates may be poor people and vice-versa.
Some illiterates may be unemployed and vice-versa.
Some poor people may be unemployed and vice-versa.
Some illiterate poor people may be unemployed.
Some unemployed poor people may be illiterates.
Some illiterate unemployed may be poor people.
From above it is clear that option ( B ) represents the best relationship between illiterates, poor people and unemployed. As shown in given venn - diagram .

As per the above given question , we know that
Cow and goat are different from each other and both are animals.
From above it is clear that option ( A ) represents the best relationship between Cows, Animals and Goats . As shown in given venn - diagram .

On the basis of above given question , we know that
All Lawyers are educated.
All Teachers are educated.
Some Lawyers may be teachers and vice-versa.
It is clear that option ( C ) represents the best relationship between Lawyers, Teachers and Educated . As shown in given venn - diagram .

On the basis of above given question , we can say that
Brinjal is a Vegetable but Meat is different from the both.
As shown in figure , option ( C ) represents the best relationship between Brinjal, Meat and Vegetables .

As we know that ,
Crow is different from Eagle.
But, both comes under the class bird.
From above it is clear that option ( B ) represents the best relationship between Days, Year and Months. As shown in given venn - diagram .

As we know that ,
All mothers are women.
All women are people.
It is clear that option ( B ) represents the best relationship between people, women and mothers. As shown in given venn - diagram .

On the basis of above given question , we can say that
Goat is different from cow.
But both are milk animals.
Hen is different from both goat and cow.
From above it is clear that option ( C ) represents the best relationship between milk, goat, cow and hen. As shown in given venn - diagram .

As we know that ,
Every thing is composed of molecules.
Sun is different from Moon.
From above it is clear that option ( C ) represents the best relationship between Sun, Moon and Molecule. As shown in given venn - diagram .

As we know that ,
Man is different from vegetables and cow.
It is clear that option ( A ) represents the best relationship between Man, Vegetables and Cow. As shown in given venn - diagram .