What is the outcome when B1 singles to right and subsequently misses second base but reaches third after a throw goes into the dugout?

When a base runner misses a base while advancing, it is generally a violation of the rules of the game. In this scenario, B1 successfully reaches first base and then proceeds to run towards third base, missing second base along the way. As per official baseball rules, specifically regarding base running, a player is required to touch all bases in order. Missing a base means that the player is considered to have not legally completed their run.

While the throw into the dugout allows for the possibility of extra bases being awarded, it does not negate the requirement to properly touch each base. Thus, when the runner (B1) misses second base, a proper appeal by the defense can lead to an out being called. So, in this case, B1 is declared out for failing to properly touch second base, irrespective of the situation with the throw and the potential for advancing further.

The other outcomes are invalid due to the fact that they do not address the requirement for base runners to legally touch each base. The rules stipulate that a player must legally touch each base to be recognized as having successfully scored.