988. Cube strength of controlled concrete to be used for pretensioned and post-tensioned work respectively should not be less than__________________? September 7, 2025 by Admin A. 35 MPa and 42 MPa B. 42 MPa and 35 MPa C. 42 MPa and 53 MPa D. 53 MPa and 42 MPa ✅ The correct answer is option B.