What is A poisonous snake that begins with a?

Answer 1

Adder

yea but do u know what the frist snake ever it Titanoboa cerrejonensis and lived in 60 million years and still allived

There are none still alive, tho the size of it is compareable with pythons or - I'm guessing this is what you're after- anaconda. (altho the anaconda isn't poisonous)

Consider the Adder, commonly called the: Death Adder(Acanthophis antarcticus) or the Australian Brown Snake (Pseudonaja textilis), Asp Viper,(Vipera aspis zinnikeri).