Select the option that contains a grammatical error in the underlined portion.
When Mrs. Sinha came to see Varanasi in 2019, Nupur has already been teaching there for five years.
1
When Mrs. Sinha came to see Varanasi in 2019, Nupur has already been teaching there for five years.
2
When Mrs. Sinha came to see Varanasi in 2019, Nupur has already been teaching there for five years.
3
When Mrs. Sinha came to see Varanasi in 2019, Nupur has already been teaching there for five years
4
When Mrs. Sinha came to see Varanasi in 2019, Nupur has already been teaching there for five years.