(LH-SH)/SH
(LH+SH)/SH
SH/(LH-SH)
SH/(LH+SH)
2.4
2400
40
1
2.2
0.453
None of these
2 and 5
3 and 4
1 and 6
3 and 7
Lead & Tin
Lead & Copper
Tin & Copper
Silver & Tin