VB.net Datagridview, bind combobox with different datasources

Question

I'm having a hard time figuring out how to bind items with datasource in each row in each combobox in my datagridview.
Basically, I have 3 columns, 1st and 2nd rows are texts while the third row is a combobox.
1st row is the question category
2nd row is the question
3rd row is the answer for each question

the answer varies per question, that's why the answer is set as a combobox.

This is what I've got so far..

For Each question As CRM.Domain.Entities.CampaignDB.CampaignQuestion In questions
    'get question category
    questionCategoryStr = questionCategory.Find(Function(column) column.QuestionCategoryId = question.QuestionCategoryId)
    'filter the answers
    answerStr = answers.FindAll(Function(column) column.CampaignQuestionId = question.CampaignQuestionId)

     Dim dgvcc As New DataGridViewComboBoxCell
     With dgvcc
         .DataSource = answerStr
         .ValueMember = "CampaignAnswerId"
          .DisplayMember = "Answer"
     End With

     'this will only add rows with question category and the question, 
     dgvSurveyQuestions.Rows.Add(questionCategoryStr.CategoryName, question.Question)
     'however, if I do this
     dgvSurveyQuestions.Rows.Add(questionCategoryStr.CategoryName, question.Question, dgvcc)
     'it throws an error "Datagridview Default Error Dialog"
Next

Answer 1

lol okay now I get it..

 dgvSurveyQuestions.Rows.Add(questionCategoryStr.CategoryName, question.Question)
 dgvSurveyQuestions.Item(2, rowIndex) = dgvcc

rowIndex is a counter that starts from zero and increments as the loop progresses.