All of the options listed in the question - Strontium-90, Iodine-131, and Cesium-137 - are radioactive substances that can enter the human body through the food chain and cause physiological disorders.

Option 1: Strontium-90 is a radioactive isotope of strontium, a chemical element. It can be present in food due to contamination from nuclear power plants or nuclear weapons testing. When ingested, Strontium-90 can accumulate in the bones and teeth and emit harmful radiation, leading to various physiological disorders.

Option 2: Iodine-131 is a radioisotope of iodine that is released into the environment during nuclear accidents or nuclear weapons testing. It can enter the human body through contaminated food or water. Iodine-131 concentrates in the thyroid gland and emits radiation, which can cause thyroid disorders and other health issues.

Option 3: Cesium-137 is a radioactive isotope of cesium, which is released during nuclear accidents or nuclear weapon explosions. Cesium-137 can enter the food chain through soil and plants. Ingestion of food contaminated with Cesium-137 can lead to radiation exposure, affecting various physiological processes and potentially causing disorders.

Therefore, the correct answer is option