Reduced the option selection threshold from One to Zero

lib/ui/marathon/marathon_provider.dart

@@ -219,7 +219,7 @@ class MarathonProvider extends ChangeNotifier {
       oneSec,
       (Timer timer) async {
         // This 1 is just to show the color of answer tile for 1 and then update card status
-        if (totalCurrentQuestionTime - currentGapTime == 1) {
+        if (totalCurrentQuestionTime - currentGapTime == 0) {
           if (callCountThreshold == 0) {
             getCorrectAnswerAndUpdateAnswerColor();
           }

lib/ui/marathon/widgets/question_card.dart

@@ -130,7 +130,7 @@ class AnswerContent extends StatelessWidget {
                 return AnswerTileForText(
                   index: index,
                   onAnswerTapped: () {
-                    if (provider.totalCurrentQuestionTime - provider.currentGapTime <= 1) {
+                    if (provider.totalCurrentQuestionTime - provider.currentGapTime <= 0) {
                       null;
                     } else {
                       provider.updateCurrentQuestionOptionStatus(QuestionsOptionStatus.selected, index);