In the following questions, some part of a sentence may have errors. Find out which part of the sentence has an error and select the appropriate option. If a sentence is free from error, select 'No error'.
My sister-in -laws (1) `//` who live in Kolkata (2) `//` have come to stay with us. (3) `//` No Error (4)

Answer

1

Explanation

The plural of compund noun -sister - in - law is sisters -in-law.
Hence, My sisters-in- law should be used here.