The development of first 28 days strength is on account of the hydration of
(a) Tricalcium silicate
(b) Dicalcium silicate
(c) Tricalcium aluminate
(d) Tetra calcium alumina ferrite
(a) Tricalcium silicate
(b) Dicalcium silicate
(c) Tricalcium aluminate
(d) Tetra calcium alumina ferrite