Question

Given set A = {a, b, c}, B = {p, q, r}and C = {x, y, z, m, n, t}, which of the following could be a universal set for all the three sets A, B and C?


1. P = {a, b, c, p, q, x, y, m, t}
2. Q = {ϕ}
3. R = {a, c, q, r, b, p, t, z, m, n, x, y}
4. S = {b, c, q, r, n, t, p, q, x, m, y, z, f, g}

Answer 1

Answer:

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