Choose the correct option.
$x$ - More than $70$ percent of all the species recorded are animals.
$y$ - The number of algae species in the world is more than the combined total of the species of fishes,amphibians,reptiles,and mammals.
$z$ - India is one of the $15$ mega diversity countries of the world.

• A
  $x, y$ - true,$z$ - false
• B
  $x, y, z$ - true
• C
  $y, z$ - true,$x$ - false
• D
  $x$ - true,$y, z$ - false