The correct answer is A. PQRS.
The sentence is about the speaker’s experience of the friendliness and hospitality of the people in Calcutta. The speaker has never met such friendliness and hospitality in any other city. The sentence is in the past tense, so the verb “have met” should be in the past tense as well. The word “like” is used to compare two things, so it should come after the noun “friendliness and hospitality.” The word “in” is used to indicate a location, so it should come after the noun “city.” The word “I” is the subject of the sentence, so it should come at the beginning of the sentence.
The other options are incorrect because they do not follow the rules of grammar and syntax. Option B, PRSQ, is incorrect because the word “like” comes before the noun “friendliness and hospitality.” Option C, PSRQ, is incorrect because the word “in” comes before the noun “city.” Option D, QPRS, is incorrect because the word “I” comes after the subject of the sentence.