Consider the following statements : 1. Some species of turtles are herbivores. 2. Some species of fish are herbivores. 3. Some species of marine mammals are herbivores. 4. Some species of snakes are viviparous. Which of the statements given above are correct?

Option (D) is correct because all four statements accurately reflect biological diversity: Green Sea Turtles are herbivores, Parrotfish are herbivorous fish, Dugongs are herbivorous marine mammals, and Vipers or Boas are viviparous snakes. Option (b) is the most tempting wrong choice for candidates who mistakenly believe all snakes are oviparous (egg-laying), overlooking that several species give birth to live young. The core concept tested is biological diversity and the specific ecological niches or reproductive strategies that exist as exceptions to general rules within animal taxa.