AP EAMCET Medical 2015 Paper

Study the following statements about chordata.
(A) Columella auris present in the middle ear of amphibians is modified hyomandibula of fishes.
(B) Reptiles lay cleidoic eggs.
(C) Sphenodon is a connecting link between amphibians and reptiles.
(D) Panther a tigris is an extinct animal of India.
From the above, identify the correct statements.