By Examining Strangeness Determine Which Of The Following Decays Or

By examining strangeness, determine which of the following decays or reactions proceed via the strong interaction:
(a) K0 ( (+ + (¯;
(b) (0 + p ( (+ + n;
(c) (0 ( p + (¯;
(d) K- + p ( (0 + (0.

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