Consider the following statements:
Some species of turtles are herbivores.
Some species of fish are herbivores.
Some species of marine mammals are herbivores.
Some species of snakes are viviparous.
Which of the statements given above are correct?
a. 1 and 3 only
b. 2, 3 and 4 only
c. 2 and 4 only
d. 1, 2, 3 and 4