A wire (10 cm)h as resistance 12 $\mathrm{\Omega }$. It is bent in the form of a circle. The effective resistance between the two points of any diameter is equal to :

• A

  12 $\mathrm{\Omega }$

• B

  6 $\mathrm{\Omega }$

• C

  3 $\mathrm{\Omega }$

• D

  24 $\mathrm{\Omega }$