# Which of the following alloys does not contain aluminium ?

$\begin {array} {1 1} (A)\;Duralumin & \quad (B)\;Magnalium \\ (C)\;Alnico & \quad (D)\;Constantan \end {array}$

Constantan is an alloy of Cu ( 60 % ) and Ni (40 %).
edited Jul 28, 2014