Choose the most suitable option to complete the dialogue.
Mrs. K: Hello, Nita.
Nita: Hello, Mrs. Kumar. How have you been?
Mrs. K: Good. By the way, Nita, I'm having a party for my brother, Arun. He's the one who's come from the States. It's on Sunday. I'd like you to come.
Nita: __________________________
a. Where's it going to be? Who else is coming and how many people are you asking?
b. Oh! I wouldn't miss it for all the chocolate in the world.
c. Sure. I love parties. Parties mean food. Hope there'll be lots of it.
d. Sure, I'll be there. Arun's back, is he? It'll be nice to see him again.

Hint: Dialogue refers to the lines spoken by two or more characters in a drama or fiction.

Complete step by step solution:
The given dialogue in this question includes Mrs. K asking an imperative question to Nita, who’s response we have to determine from the given options.
An imperative sentence/question is the type of sentence/question that gives instructions or advice, and expresses a command, an order, a direction, or a request.

Here, that request is made to Nita, who is requested to come attend Mrs. K’s party.

The most suitable reply to such an imperative statement is option (d.), which is “Sure, I'll be there. Arun's back, is he? It'll be nice to see him again.”
This is because the remaining given options are either interrogative (option a.) or simply a statement (option b and c) instead of a reply to an imperative question.
Therefore, the correct answer is option (d.) Sure, I'll be there. Arun's back, is he? It'll be nice to see him again.

Note: In such a question, you have to first determine the type of question given in the dialogue and then determine the answer.