This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Acquired Cataract, Subject name: Ophthalmology
Cataract is caused by - 
Select and explain. 
A. Hypoparathyroidism, B. Cigrate smoking, C. Non-ionizing radiation, D. All of the above
D: All of the above
Answer: D: All of the above 
Explanation: Ans. is 'd' i.e., All of the aboveCauses of CataractSystemic diseases Dermatological diseasesAge related & Physical agentsToxic agentsOtherso Hypoparathyroi-dismo Ichthyosiso Senile cataracto Corticosteroidso Maternal infections# CMV# Toxoplasmosis# Rubellao Atopic dermatitiso Sunlight & UV rayso Chlorpromazineo Hypocalcemia o Werner syndromeo Traumao Busulfano Diabetes (Hypergly- cemia)o Rothmud's syndromeo Ionizing radiation# X-ray, y-rays# Neutronso Anticholinesteraseo Chloroquineo Obesityo Hypoglycemiao Amiodaroneo Severe diarrheao Dystrophia myotoniao Nonionizing radiation# Infrared# Microwaveo Cigratte smokingo Coppero Galactosaemiao Irono Alport syndromeo Electric shock (electric cataract)o Goldo Lowe syndromeo Diureticso Stickler syndromeo Vitamin A, C & E deficiency o Down syndromeo Wilson's diseaseo Hypothyroidismo Galactokinase deficiencyo Neurofibromatosis type IIo Hypertensiono Heat (Infrared cataract)