lily asked ,"is your mother washing clothes now.同义句用lily ask

Lily asked me if/whether my mother was washing clothes then.
注：此题考查直接引语变间接引语：if和whether选用其一,而now要变成then,现在进行时要变成过去进行时.

Lily asked me was my mother washing clothes then.

lily asked me whether my mother was washing clothes then.

Lily asked me if or whether my mother was washing clothes then.