This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Poisoning, Subject name: Forensic Medicine
Polyvalent snake antivenin consists of the venom of - 
Select and explain. 
A. Naja Naja, B. Hypernale hypernale, C. Echis carinate, D. Daboia russel
A: Naja Naja
Answer: A: Naja Naja 
Explanation: In India, polyvalent antivenom is commonly available which is effective against the Big Four: common cobra, common krait, Russell's viper and saw-scaled viper Common cobra Zoological name: Naja naja Common names: Common cobra, nag Common krait Zoological name: Bungarus caeruleus Common name: Indian krait, common krait, Maniyar,Kawadya Banded Krait Zoological name: Bungarus fasciatus Common name: Banded krait Saw scaled viper Zoological name: Echis carinatus Common name: Carpet viper, phoorsa, afai Russell's viper Zoological name: Vipera russelli Common name: Kander, ghonas REF;THE SYNOPSIS OF FORENSIC MEDICINE:KS NARAYANA REDDY;28th EDITION;