Any medical test will sometimes fail to detect a condition when it is present and indicate that there is one when it is not.
(A) a condition when it is present and indicate thatthere is one -"There is one" - not a proper usage
(B) when a condition is present and indicate that there is one -fail to detect something - when is used to denote a time. fail to detect X when Y happened.
(C) a condition when it is present and indicate that it is present - Correct. it correctly and logically
...
(A) a condition when it is present and indicate thatthere is one -"There is one" - not a proper usage
(B) when a condition is present and indicate that there is one -fail to detect something - when is used to denote a time. fail to detect X when Y happened.
(C) a condition when it is present and indicate that it is present - Correct. it correctly and logically
...
