If z in C, which of the following relati...

If z `in` C, which of the following relation(s) represents a circle on an Argand diagram? (where,`i=sqrt(-1)`)

A

`abs(z-1)+abs(z+1)=3`

B

`abs(z-3)=2`

C

`abs(z-2+i)=7/3`

D

`(z-3+i)(bar(z)-3-i)=5`

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The correct Answer is:

B, C, D

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