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Discussion Starter · #3 ·
its clearly written in robbins that its thickness of submucosal gland / thickness bet epithelia n cartilage...
so do we need to include whole thickness of cartilage n epithelia or not??:toosad:
 

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reid index is thickness of mucus gland layer to thickness of wall b/n epithelium&cartilage.(i.e. bronchial wall)so we can safely exclude A,B&E options.

the bronchial wall-it's basement membrane to perichondrium of cartilage
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so i would say C is more appropriate option rather than saying exact answer.i can't take D option as in pic depicted above the letter D represents whole thickness of cartilage not just perichondrium.plz correct me if i'm wrong.
 
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