Please solve Q4. Thank you

Q4. Find equivalent resistance between terminals A and D in following circuit.

                  

Since terminals B and C are not connected, the two corresponding

5 Ω$\mathrm{\Omega }$ resistors are open circuited. Hence the equivalent circuit is as shown

Here 5 OHM  AND 5 OHM are connected in series. 10 ohm is connected in series with another 10 ohm and combination is connected in parallel with same 10 ohm amd 10 ohm combination connected in series.
Hence equivalent resistance will be

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