4. Which one of the following statements is correct with respect to frogs? A. A mature female can lay 2500 to 3000 ova at a time B. Heart has two chambers covered by a membrane called pericardium C. In male frog, Vasa efferentia are 2-3 in number that arise from testes D. There are 2 pairs of cranial nerves arising from the brain wwwwwwww