The nitrogen atom marked 2 is most basic among all 4 nitrogen; So, Option A is correct.
In the structure drawn of caffeine attached below, we can see that there are 4 nitrogen atoms marked 1 to 4.
-The nitrogen atom marked 1 has hybridization SP2 as its lone pair are involved in resonance with the ring by which doesn't act as a proton acceptor.
-The nitrogen atom marked 2 has hybridization SP2 as its lone pair are pointing outwards and away from the ring due to which its lone pair are not involve in conjugation which makes this nitrogen atom basic and it acts as a proton acceptor in a molecule.
-The nitrogen atom marked 3 and 4 in bigger ring has hybridization SP2 as their lone pairs are involved in conjugation with ring and in resonance stabilization of amide by which they doesn't act as a proton acceptor.
Caffeine is an psychoactive drug and one of the most widely consumed substance.It helps in decreasing drowsiness.It can have both good and bad effect on health.
To Learn more about Nitrogen visit here ; https://brainly.com/question/28462872?referrer=searchResults
#SPJ4
