The correct option is C Neurotoxin and Cardiotoxin
Snake venom is highly modified saliva, containing zootoxins that facilitates the immobilization and digestion of prey and defends against a threat.
The poison of cobra and viper contains neurotoxins and cardiotoxins.
The neurotoxins acts on the nervous system and the brain.
The cardiotoxins are components that are specifically toxic to the heart.
Therefore, the correct answer is option C.