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1 Answer

Best answer
4 votes
4 votes

A)

It is correct. 

If y lies between x and z then H(x,y) + H(y,z) =H(x,z)

If y doesnt lie betwween x and z then H(x,y) + H(y,z) > H(x,z) 

B)

It is wrong since we have proved A) is correct

C)

If x and y are equal then LHS will be negative. So it is also wrong

Hence answer should be A)

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