Directions: The underlined part of the sentence below may have some errors. Five options are given below the sentence. Choose the option that improves the sentence. If the sentence has no error, choose option 5 as your answer.

Oral inspection may not yield conclusive diagnosis of deadly diseases, but however in a country like India, where blood test may not be possible on a large population, it serves an efficient screening process.

but in a country like India, where blood test may not be possible on a large population, it serves as an efficient screening process

but in a country like India, where test of large population blood may not be possible, it serves as an efficient screening process

however in a country like India, where blood test may not be possible on a large population, it serves an efficient screening process

however in a country like India, where test of large population blood may not be possible, it serves as an efficient screening process

No improvement required