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The number of tangtnts from (1,2) to the...

The number of tangtnts from (1,2) to the circle `x^(2)+y^(2)-2 x-4 y+4=0` is

A

`x^(2)+y^(2)=2 a^(2)`

B

`4 x^(2)+4 y^(2)=3 a^(2)`

C

`3 x^(2)+3 y^(2)=4 a^(2)`

D

`4 x^(2)+4 y^(2)=2 a^(2)`

Text Solution

Verified by Experts

The correct Answer is:
C
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