Question

A viviparous snake is
(a)Viper
(b)Rattle snakes
(c)Hydrophis
(d)All of the above

Answer 1

Hint: Viviparous snakes give birth to young ones that are contained within a placenta, not an egg, during their incubation within the mother's body. Snakes like some forms of boas, pipe snakes and water snakes are viviparous.

Complete answer:
Viviparous means the development of the embryo within the mother's body, eventually leading to live birth.
The Viper is viviparous, which means that it bears the young ones. All rattlesnakes are also viviparous and so are Hydrophis (bar-bellied sea snakes).

Additional Information:

Oviparous animals	Viviparous animals
-This refers to the animals that produce eggs rather than reproducing and that mature and hatch after being expelled from the body.	-This refers to the animals that give birth to developed live young individuals after the maturation.
-Lay either fertilized or unfertilized eggs.	-Give birth to young individuals.
-May undergo internal or external fertilization.	-Undergo internal fertilization.
-The development of the zygote occurs externally, that is, outside the female body.	-The development of the zygote occurs internally, that is, inside the female body.
-The embryo receives nutrients from the yolk.	-The embryo receives the nutrients from the mother.
-The chances of survival are less.	-The chances of survival are more.
-Birds, Reptiles, amphibians, most fishes, insects, are examples of this.	-Examples include most mammals.

So, the correct answer is 'All of the above'.

Note: Ovoviviparous animals are almost similar to that of viviparous species in which they have internal fertilization and therefore the young are born alive but they differ from them as there is no placental connection and the unborn young are nourished with the egg yolk instead of the nourishment from the mother and the mother's body does not provide a gas exchange.
Examples include sharks, snakes, etc.