Explanation:

Understanding the sentence:
The sentence states that Kiran got something (which is not mentioned in the sentence) the car and drove away. We need to determine the correct preposition to fill in the blank.

Meaning of the options:
a) in - inside or within a place or thing
b) into - expressing movement or action with the result that someone or something becomes enclosed or surrounded by something else
c) on - physically in contact with and supported by a surface
d) inside - the inner side or part of something

Applying the options to the sentence:
To understand which preposition is correct, let's consider the meaning of each option when applied to the sentence:

a) Kiran got in the car and drove away.
This suggests that Kiran got inside the car. However, the sentence doesn't mention that Kiran was not already inside the car.

b) Kiran got into the car and drove away.
This suggests that Kiran moved towards the car and got inside it. This option seems more appropriate as it implies a movement towards the car.

c) Kiran got on the car and drove away.
This suggests that Kiran got on top of the car, which is unlikely and doesn't make sense in the context of the sentence.

d) Kiran got inside the car and drove away.
This suggests that Kiran got inside the car. Similar to option a, this option doesn't provide information about whether Kiran was already inside the car.

Conclusion:
Based on the options provided, the most appropriate preposition to fill in the blank is into as it implies movement towards the car and getting inside it.