_Alnico, an alloy used extensively for permanent magnets contains iron, nickel, aluminium and cobalt in the following ratio$?

_Alnico, an alloy used extensively for permanent magnets contains iron

1.	_Alnico, an alloy used extensively for permanent magnets contains iron, nickel, aluminium and cobalt in the following ratio$?
A.	50 : 20 : 20 : 10
B.	40 : 30 : 20 : 10
C.	50 : 20 : 10 : 20
D.	30 : 20 : 30 : 20
Answer» B. 40 : 30 : 20 : 10