C# MVC Not able to save item list from Dropdown

Question

I have a custom <select> HTML statement with items. Unfortunately, upon submitting the form, the data is not pushed to the database but rather rendered as NULL.

Partial Code segment is as below:

<select name="RootCause" id="RootCause" class="form-control">

@if (Model.RequestType == "Membership" || Model.RequestType == "Membership/Registration" || Model.RequestType == "General Enquiries")
{
<option value="Collaboration tool error">Collaboration tool error</option>
<option value="Syntax system error">Syntax system error</option>
}

The field RootCause is where the values should be populated into.

Any assistance would be appreciated.