Question

The boundary line between
(liquid) and (liquid+solid)
regions must be part of
Tie-line
Solidus
Solvus
Liquidus​

Answer 1

Answer:The boundary line between

(liquid) and (liquid+solid)

regions must be part of

Tie-line

Solidus

Solvus

Liquidus​

the regions must be part of liquidus.

ok

Answer 2

Answer: The boundary line between liquid and liquid+solid region must be a part of Liquidus

Explanation:

PHASE DIAGRAM :

Tie line indicates the association between two phases among three phase .

Solidus is described as the temperature boundary between  solid and liquid+solid.

Solvus boundary line is the apart where only solid phase is found.