in a crowded metropolis, _________ you come across
Show answer & explanation
Correct answer: A
Explanation
The correct answer is option 1 i.e. What.
- 'Where' and 'when' are not the appropriate words as they express place and time respectively.
- 'What' is used in the beginning of the sentence when there is no subject (antecedent).
Hence, the chosen option is correct.