The correct answer is: Sanda said, “I used to know a lot of people in Delhi but I have few friends in Kolkata.”
The sentence “Sanda said that she used to know a lot of people in Delhi but I had few friends in Kolkata” is in the past tense. This means that Sanda is talking about a time in the past when she knew a lot of people in Delhi but had few friends in Kolkata.
The answer choices A, B, and D are all in the present tense. This means that they are talking about a time in the present, when Sanda still knows a lot of people in Delhi and has few friends in Kolkata. However, the sentence in the prompt is in the past tense, so the correct answer must also be in the past tense.
The answer choice C is in the past tense, but it is not the correct answer because it uses the word “fewer.” The word “fewer” is used to compare two quantities that are both measurable. In this case, Sanda is not comparing the number of friends she has in Delhi to the number of friends she has in Kolkata. She is simply saying that she used to know a lot of people in Delhi but now has few friends in Kolkata.
Therefore, the correct answer is: Sanda said, “I used to know a lot of people in Delhi but I have few friends in Kolkata.”