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Question

For all complex number z1, z2 satisfying open vertical bar z subscript 1 end subscript close vertical bar = 12 and open vertical bar z subscript 2 end subscript minus 3 minus 4 i close vertical bar equals 5, the minimum value of open vertical bar z subscript 1 end subscript minus z subscript 2 end subscript close vertical bar is -

  1. 0    
  2. 2    
  3. 7    
  4. 17    

The correct answer is: 2

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