A)
B)
C)
D) Can't be determined
Correct Answer: A
Solution :
...(i) 
...(ii) 
...(iii) From (i) and (ii), we have 
+ 6 kg = 9 kg = 3 kg From (i) and (iii), we have 
+ 5 kg = 9 kg = 4 kg Now from (i), we have 4 kg + 3 kg + 
= 9 kg 
= 2 kg So, 
is the heaviest.
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