The quark combination of a particle is usˉu\bar{s}usˉ. Which is true for this particle?
It has a baryon number of 1.
It has a charge of +1.6×10−19 C+1.6 \times 10^{-19}\text{ C}+1.6×10−19 C.
It is a pion.
It has a strangeness of −13-\frac{1}{3}−31.