In this task you are given a medical question pair hand-generated. Your task is to classify a given post into two categories 1) 'Similar' if the given two questions have a same connotation 2) 'Dissimilar' if the given two questions have a different connotation or meaning.

Q: Sentence1: I can feel small lymph node in my neck the doctor said its 9m is this normal.Iam itlle worry.But the rest of the lymph node i can't feel them. 
 Sentence2: I have swollen lymph nodes in my thigh region, the doctor mention that it's 9mm. I can't feel any lymph node in the neck and armpit region. Do I have STD/STI? 

A: Dissimilar
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Q: Sentence1: I can't see in the dark as well as others can? Do I need carrots or vitamin a? 
 Sentence2: Can deficiency of Vitamin A result in inability to see in dark?

A: Dissimilar
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Q: Sentence1: I have been having lightheadedness for a while. Would a CT of head and an MRI with contrast of brain detect blockages in arteries? 
 Sentence2: I am worried about blockage in my brain arteries because I have been having lightheadedness for some time. Can a CT of scan or MRI with contrast may help diagnose it?

A:
Similar
****