Denoting L as liquid and M as solid in a phase-diagram with the subscripts representing different phases

Q. Denoting L as liquid and M as solid in a phase-diagram with the subscripts representing different phases, a eutectoid reaction is described by

A. M 1 →M 2 +M 3

B. L1 →M 1 +M 2

C. L1 +M 1 →M 2

D. M1 + M 2 → M 3

Ans: M 1 →M 2 +M 3