Question

This is the car ------- my father bought the last week.a.that b.which c.whose d.whom e.other​

Answer 1

The correct answer is option (a)- that.

This is the car that my father bought the last week.

• In the given case, it is an object 'car' and thereby usage of whom or whose is incorrect as they are used only for referring to people.

• Next, we have the options 'that' and 'which'. Both are used for objects but the difference is given below:

That- used for a restrictive clause( a clause that is essential to form the meaning of a sentence, without which the meaning changes).

Example: Who took the book that I bought this week?

Which- used for non-restrictive/parenthetical clause.

Example: My cycle, which is red, is missing.

Answer 2

Here is the correct answer:

This is the car, which my father bought the last week.

or

This is the car that my father bought the last week.

Explanation

"which' or 'that' are relative pronouns. It is relative pronoun case. Which is a relative pronoun used in defining or non-defining relative clause. ‘Which’ as a pronoun can only be used to refer only to things.  

Defining relative clause functions or identifies which person or thing you are talking about. Non-defining relative clause only describes and adds extra information about somebody or something.  If left out, the sentence would still make sense. A non-defining relative clause is usually put in commas.

'That' can also be used in relative clause. When we use 'that', we don't use comma.