Question: Which of the following is not true in pub/sub model? (a) Any number of publishers can put messages to a queue. (b) Any number of

Which of the following is not true in pub/sub model?

(a) Any number of publishers can put messages to a queue.

(b) Any number of subscribers can consume messages from the queue.

(c) Each message is consumed by only one subscriber.

(d) Messages on a topic remain valid as long as they are being distributed to current subscribers.

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