The correct options are
A Sea horse
B Salamander
D Tortoise
Poikilotherms, also known as cold blooded animals, are animals that make use of external sources of heat to regulate their internal temperature. Due to this, their internal temperature varies greatly according to its surroundings. This a reason why they are also known as ectotherms. The organisms belonging to the classes Pieces, Amphibia and Reptilia are poikilotherms.