Which of the following statements is true about hiv testing? a. a positive hiv test result doesn't require follow-up tests, due to the high accuracy of the testing. b. testing isn't normally necessary as hiv symptoms manifest early and are distinctive. c. some hiv tests can provide results in as little as 20 minutes. d. hiv testing is now conducted routinely as part of a standard general check-up for most patients.

Statement A, C and D are true.

Explanation:

HIV virus spreads by body fluids that attacks the immune system of the body. It mostly affects the CD4 cells commonly known as T-cells of the body.

It symptoms includes fatigue, malaria and is not easily detectable. It is mostly confused with common cold and flu.

Once a test is done in case of HIV it is 100% accurate and does not requires further follow up tests.

FDA has also approved a test kit which can detect the presence of HIV virus in less than 20 minutes. It can also be conducted as a part of general check up for patients.

Hence excluding statement B, all the other parts are true.

all matter is made up of atoms

in any element all atoms are the same

elements in a compound are always in a constant ratio: apex