test

if ([appDel.arrQuestionAnsData count] > 0) {
        [appDel.arrQuestionAnsData removeAllObjects];
        [appDel.arrQuestionAnsData release];
        appDel.arrQuestionAnsData = nil;
    }
    appDel.arrQuestionAnsData = [[NSMutableArray alloc] init];

    appDel.arrQuestionAnsData = [appDel.dictForCategoryData objectForKey:strCategoryName];