Find out the right

Study the given letter, number, symbol series and answer the question that follows.

If a mirror is place on the line XY, then which of the answer figures is the mirror image of the given figure?

Select the option figure in which the given figure (X) is embedded (rotation is NOT allowed). 

Select the correct option from the given options that can make a full square. (3 of the 5 images given below are given)

Select the Venn diagram that best represents the relationship between the following classes.

Blue, Water, Star

Select the word-pair that best represents a similar relationship to the one expressed in the pair of words given below.

If ‘R @ S %T & U # V’, then how is R related to U?

Replace the question mark with an option that follows the same logic applied in the first pair. Immunology : Immune system :: Hydrology: ??