This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Lens, Subject name: Ophthalmology
Nuclear drop is seen in? 
Select and explain. 
A. Posterior polar cataract, B. Posterior subcapsular cataract, C. Coical cataract, D. Congenital cataract
A: Posterior polar cataract
Answer: A: Posterior polar cataract 
Explanation: Nuclear drop or dropped lens is complication of cataract surgery. During cataract surgery theremay ber tear in posterior capsule causing droping lens in vitreous. "The impoance of posterior polar cataract lies in its higher risk of complication - posterior capsular tear and possible nucleus drop during surgery". (Ref: www.ncbi.nlm.nih.gov)