1797. Which of the following is correct_______________?

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A. Non-keratinized epithelium is characterized by absence of stratum granulosum and stratum corneum, The surface cells are nucleated
B. Parakeratinished epithelium is characterized by superficial cells with pyknotic nuclei and absence of stratum granulosum
C. In ortho keratinisation the superficial cells lose their nuclei, but stratum granulosum is present
D. All of the above
✅ The correct answer is option D. All of the above.

1788. A radiograph of 4- years old child reveals no evidence of calcification of mandibular second pre molar. This indicates______________?

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A. It is too early to make final predication
B. The teeth may develop later
C. Primary second molar extracted to allow mesial drifting of permanent first molar
D. The child may never develop premolars
✅ The correct answer is option B. The teeth may develop later.

The cavity varnish applied reduces post operative sensitivity in amalgam restoration by____________?

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A. Decreasing conduction of heat to pulp
B. Minimize marginal leakage around restoration
C. By altering the chemical composition of restoration materials
D. By preventing penetration of corrosion products into the dentinal tubules
✅ The correct answer is option B. Minimize marginal leakage around restoration.