Question

Fill in the blank with the best option:

A parallelogram _______ four sides are equal in length is called a rhombus.

• A. who
• B. whom
• C. whose
• D. which

Answer 1

The correct option is C whose

Relative Pronoun shows the relation between the relative clause and the main clause. It is used like conjunction to join two sentences

e.g. who, whose, which, whom,etc.

who and whom is used for animal or living beings

which is used for lifeless things. in this case which requires a verb to support it.

The above sentence using which has to be modified like

A parallelogram which has four sides are equal in length is called a rhombus.

whose is the appropriate answer. It can also be used for lifeless things e.g. This is the sum whose solution I know well.

Hence the sentence using which becomes -

A parallelogram whose four sides are equal in length is called a rhombus.