This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: None, Subject name: Pathology
Histopathologic study of lichen planus shows: 
Select and explain. 
A. Mixed cellular inflammatory infiltrate, B. Presence of T-Lymphocytes predominantly, C. Antiepithelial antibodies, D. Scattered infiltrate with ill-defined lower border
B: Presence of T-Lymphocytes predominantly
Answer: B: Presence of T-Lymphocytes predominantly 
Explanation: Histologic features of lichen planus include: 

Saw, tooth appearance of retepegs
Liquefaction degeneration of basal layer which is replaced by thin band of eosinophilic coagulum
Presence of civatte bodies
Characteristic band Like subepithelial mononuclear infiltrate consisting of T- lymphocytes and histiocytes sharply limited to papillary and most superficial portion of the reticular layers of connective tissue
Hyperparakeratosis or hyperorthokeratosis
Thickening of granular layer