How is Gibb‚Äö√Ñ√∂‚àö√ë‚àö¬•s phase rule defined?#

How is Gibb‚Äö√Ñ√∂‚àö√ë‚àö¬•s phase rule defi

1.	How is Gibb‚Äö√Ñ√∂‚àö√ë‚àö¬•s phase rule defined?#
A.	C+P+1
B.	C+P+2
C.	C-P+2
D.	C-P
Answer» D. C-P