Final answer:
The question is about identifying a legal chess move in algebraic notation from the given options. The legal move from 'A2' would be to either 'A3' or 'A4', but with only options on rank 2 provided, 'B2' is the only one that could represent a legal pawn move from its starting position.
Step-by-step explanation:
The question refers to algebraic chess notation, which is a method of recording and describing the moves in a game of chess. In algebraic notation, the columns ('files') are labeled from 'a' through 'h' and the rows ('ranks') from '1' to '8'. Each square on the chessboard is identified by a unique coordinate pairing, with 'a1' being the bottom-left corner from White's perspective.
In the context of your question, you've mentioned an illegal move, 'A2'. Since this refers to pawn movement and pawns move forward, the legal move would be moving the pawn from A2 to A3 or A4. However, as these options are not presented, we should consider the moves provided. Typically, in a chess game, pawns can move one or two squares forward from their starting rank, so the move from 'A2' would likely involve a pawn.
Therefore, among the options given, only option A) 'B2' is on the same rank as 'A2' and could represent a legal pawn move.