Rahul Dravid is reported to have scored 1 run off 100 balls.
While specific instances of this occurring are difficult to definitively verify without detailed match scorecards readily available, Rahul Dravid is a prominent name associated with defensive, long-lasting innings in cricket history. It's plausible, although rare, that he achieved such a feat in a Test match situation, where occupying the crease for extended periods is sometimes prioritized over scoring rapidly.
The context would likely be a Test match where India was facing a particularly strong bowling attack or needing to draw a match. In such scenarios, a batsman might prioritize survival and minimizing risk over scoring runs, leading to a very slow scoring rate. While unusual, this kind of innings is not unheard of in Test cricket. It's important to note that without a specific match context, this assertion relies on anecdotal cricket discussions.