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If p, q, r and s are positive real numbe...

If `p, q, r` and `s` are positive real numbers such that `p+ q + r + s = 2`, then `M=(p+q)(r+s)` satisfies the relation, when (A) `0 lt M leq 1` (B) `1 leq M leq 2` .(C) `2 leq M leq 3` (D) `3 leq M leq 4`

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