Select the most appropriate option to fill in blank no.4.
Show answer & explanation
Correct answer: C
Explanation
The correct answer is Option 3 i.e. constant.
The given blank is talking about the continuous damage to the cells due to smoking.
From the given options, it is clear that the word 'constant' which means 'occurring continuously over a period of time' is the most appropriate word for the given blank.
Hence, the correct answer is Option 3 i.e. constant.