Identify the diagram that best represents the relationship among the given classes.

Environment, Nitrogen, Oxygen, Weather

If a mirror is placed on the line MN, then which answer figures is the right image of the given figure?

Introducing a man, a woman says, "His son's mother is the only daughter of my mother". How is the man related to the woman?

Aryan is facing west. He turns right and walks 20 m, then he turns left and walks 10 m. From there he walks 7 m to the north and then 10 m towards the west. In which direction is he from his original position?

In the following question, which one set of letters when sequentially placed at the gaps in the given letter series shall complete it?

gh_i_hi_ig_ii_ _

If "–" stands for division, "+" stands for multiplication, "÷" stands for subtraction and "×" stands for addition, which of the following equations is correct?

Select the missing number from the given options?