During radiotherapy the Buccal Mucosa exhibits radiation reaction before skin due to -: (A) Rapid cellular turn-over in bone, (B) Slow cellular turn-over in blood vessel, (C) Rapid cellular turn-over in skin, (D) Rapid cellular turn-over in mucosa
Answer is D. Rapidly dividing cells are generally more radio sensitive then slowly dividing cells, reflecting radiation induced inhibition of D.N.A. synthesis.