Which of the statements concerning blood collection in mice and rats is true?

The correct option is this: POTENTIALLY LESS PAINFUL ALTERNATIVES TO RETROORBITAL BLOOD COLLECTION INCLUDE LATERAL SAPHENOUS AND JUGULAR VEIN BLOOD COLLECTION.
Rats are very important in research work and they are often used to test the effects of various substances in the body. To do this, blood has to be collected from the rats and this can be done in various ways. But some methods of blood collection is more painful than the others. Collecting blood from the  retro orbital vein is less painful compared to other methods.

4, two dominant and two recessive