I'm not able to understand that what is written in the pic.. As I can't understand this language..
Treatment that uses drugs to stop the growth of cancer cells, either by killing the cells or by stopping them from dividing. Chemotherapy may be given by mouth, injection, or infusion, or on the skin, depending on the type and stage of the cancer being treated.
Answer:
A !!
it a mix where everything is combined together
It is option A 4s cause n=4, l=1 this is 4s orbital
The answer is D they have 4 neutrons
The chemical symbol for gold is AU
