There are 4 possible outcomes.
1. SPP retains Potong Pasir, lose Bishan-Toa Payoh.
2. SPP lose Potong Pasir, win Bishan-Toa Payoh.
3. SPP win both Potong Pasir and Bishan-Toa Payoh.
4. SPP lose Potong Pasir and Bishan-Toa Payoh.
Which one is the most likely to happen? I don't know what to
say. 