HomeUPSCMoho discontinuity refers to a discontinuity between the _____ and _____ layers of the earth. 808. Moho discontinuity refers to a discontinuity between the _____ and _____ layers of the earth.By Admin / October 4, 2025 A. Sial and Sima B. Sima and Mantle C. Sial and Mantle D. Mantle and Core ✅ The correct answer is option B.