This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Cells of epidermis, Subject name: Dental
Parakeratosis most frequently occurs in which of the following? 
Select and explain. 
A. Actinic keratosis, B. Seborrheic keratosis, C. Molluscum contagiosum, D. Basal cell carcinoma
A: Actinic keratosis
Answer: A: Actinic keratosis 
Explanation: Parakeratosis - retention of nucleus in stratum corneum Parakeratosis is seen in - PEA'S2 - Psoriasis- Eczema- Actinic keratosis- Seborrheic dermatitis- Squamous cell carcinoma Seborrheic keratosisIt is benign, presents with keratotic papules with stuck on appearance and these lesions suggest underlying malignancy like gastric adenocarcinoma.Also k/a Leser-Trelet sign Actinic keratosis It is premalignant condition, keratotic papules seen over sun exposed areas