Option (ख) 'स्नेहमयी और दृढ़' is the correct answer because the mother's words in the poem reflect her deep affection and worry for her son, along with a firm resolve. She advises him to stay silent and not let anyone have any doubts, which shows that while she is loving and caring (स्नेहमयी), she is also strong and resolute (दृढ़) in her guidance.