The concept of undermining by ‚Äö√Ñ√∂‚àö√ë‚àö‚â§foundation‚Äö√Ñ√∂‚àö√ë‚àö¬• was put forward by____________$

The concept of undermining by ‚Äö√Ñ√∂‚àö√ë‚àö‚

1.	The concept of undermining by ‚Äö√Ñ√∂‚àö√ë‚àö‚â§foundation‚Äö√Ñ√∂‚àö√ë‚àö¬• was put forward by____________$
A.	F.F.Haigh
B.	Khosla
C.	Casagrande
D.	Pavlov sky
Answer» B. Khosla