Q: Fact 1: Organs of excretion make up the excretory system. Fact 2: Excretory system is composed of a dorsal excretory gland and a pair of Malpighian tubules. Given the two facts above, what are organs of excretion?

Pick from:
(1). kalenchoes;
(2). Malpighian tubes;
(3). solid, liquid, gas;
(4). ankles;
(5). rocks;
(6). tibias;
(7). the body's largest organ;
(8). Veins and arteries.;
The answer is:
(2).