The diagram below shows a river system consisting of 7 segments, marked $P, Q, R$, $\mathrm{S}, \mathrm{T}, \mathrm{U}$, and V . It splits the land into 5 zones, marked $\mathrm{Z} 1, Z 2, Z 3, Z 4$, and $Z 5$. We need to connect these zones using the least number of bridges. Out of the following options, which one is correct?

Note: The figure shown is representative.