You have been given a physical balance and 7 weights of 43, 45, 30, 33, 28, 37 and 55 kgs. Keeping weights on one pan and object on the other, what is the maximum you can weigh less than 145 kgs.  Options.
A) 145
B) 143
C) 147
D) 141
E) 142

Rationale: 55 + 43 + 45 = 143 answer : b
Answer: B