True/False
1. Al is used in preparation of parts of airplane and manufacture of alloy alnico.
2. Copper is used in preparation of tubes of boilers, delta metal and muntz metal.
3. Copper and aluminum are used in alloys – Duralumin, Aluminum bronze.
4. Cu & Zn are used in manufacture of German Silver.
(a) TFTF
(b) TTFT
(c) TFFT
(d) TFTT
