###Rationale: Hypomagnesemia is least likely to cause cataract MISCELLANEOUS CATARACTS Diabetes- Snowflake/ snowstorm cataract Wilson's- Sunflower cataract, chalcosis. Bread crump appearance- Complicated cataract Coicosteroid cause posterior subcapsular cataract.(Note topical steroids cause glaucoma more; systemic cause cataract more). Oil drop cataract -galactosemia is reversible (deficiency of GPUT) Anterior lenticonus- Alpo Posterior Lenticonus- Lowe Syndrome Shield cataract- Atopic dermatitis. Radiation can cause PSC cataract. Hypocalcemic cataract - Tetanic cataract Myotonic dystrophy- Christmas tree cataract Persistent hyaloid aery&mittendorf dot -can be a cause of Posterior polar cataract.

###Answer: OPTION D IS CORRECT.
###Question: Which of the following is not a cause of cataract
###Options:
A. Diabetes
B. Wilson disease
C. Galactosemia
D. Hypomagnesemia
