How to send select dropdown value from partial handlebars to post request along with other name, address etc parameter in node express to mongodb

<form action="/<b>insertproduct</b>" id="form_validation" method="post">
    {{!-- <input type="hidden" name="_id" value="{{product._id}}"> --}}
    <div class="form-group form-float">
        <input type="hidden" id="drpcid" name="cid" value="">
        <select class="form-control" id="drpCat" class="text-capitalize">
            <option value="0">Select Category</option>
            {{#each catlist}}
            <option value="{{this._id}}">{{this.name}}</option>
            {{/each}}
        </select>
    </div>
    <div class="form-group form-float">
        <input type="text" class="form-control" value="{{product.name}}"
            placeholder="Product Name" name="name" required>
    </div>
    <div class="form-group form-float">
        <input type="text" class="form-control" value="{{product.price}}"
            placeholder="Price" name="price" required>
    </div>
    <div class="form-group form-float">
        <input type="text" class="form-control" value="{{product.instock}}"
            placeholder="In Stock" name="instock" required>
    </div>
    <div class="form-group form-float">
        <textarea name="description" cols="30" rows="5" value="{{product.description}}"
            placeholder="Description" class="form-control no-resize"
            required>{{product.description}}</textarea>
    </div>
    <button type="submit" class="btn btn-raised btn-primary waves-effect"> Submit</button>
    <span class="btn-success ">{{successmesg}}</span>
</form>