Explanation

The question asks for a son of Prophet Muhammad (SAW) who reached adulthood; none of the listed names directly fit this description as adult sons. Hazrat Ibrahim was not a direct son of Prophet Muhammad (SAW). Hazrat Qasim and Hazrat Abdullah are names associated with progeny but the context suggests they might not be the intended answer based on historical records regarding adult sons. Therefore, None of these is the most likely correct choice.