learndash_ques_multiple_answer_pts_each

 <?php
/**
 * Example usage for learndash_ques_multiple_answer_pts_each filter.
 */
add_filter(
	'learndash_ques_multiple_answer_pts_each',
	function( $points, $questionData, $answerIndex, $correctAnswer, $userResponse ) {
		// If the answer item is FALSE (not correct) but the student provided an answer. Then deduct the points.
		if ( ( $questionData['correct'][ $answerIndex ] == false ) && ( ! empty( $userResponse[ $answerIndex ] ) ) ) {
			if ( intval( $questionData['points'][ $answerIndex ] ) > 0 ) {
				$points -= intval( $questionData['points'][ $answerIndex ] );
			} else {
				$points -= 1;
			}
		}

		// Keep the points zero or greater.
		// First we get the key of the last answer items
		end( $questionData['correct'] );
		$last_key = key( $questionData['correct'] );

		// If we are at the last index and the points is less than zero we keep it from being negative.
		if ( ( $last_key == $answerIndex ) && ( $points < 0 ) ) {
			$points = 0;
		}

		// Always return $points
		return $points;
	},
	10,
	5
);

add_filter( 'learndash_ques_multiple_answer_pts_each', 'learndash_ques_multiple_answer_pts_each', 10, 5 );

function learndash_ques_multiple_answer_pts_each( $points, $questionData, $answerIndex, $correctAnswer, $userResponse ) {
	if ( empty( $correctAnswer ) && empty( $userResponse[ $answerIndex ] ) ) {
		$r[ $answerIndex ] = true;
		$points           += $questionData['points'][ $answerIndex ];
	}

	return $points;
}