A person who smokes 1.5 packes daily gets 300 hits of nicotine to the brain each day. One cigarette has an average 10 nicotine in it. If one and a half pack has 30 sticks of cigarette. Nicotine is very very dangerous to a man's health. IT causes several types of caner. But the answer to your question is letter C - 300.
Your answer is the nuclear envelope, The nuclear envelope is a double membrane of the nucleus that encloses the genetic material. It separates the contents of the nucleus from the cytoplasm.
