JSFiddle - React, Tailwind, and code Playground

HTML

<div >
    <div className="form-group" style="display: inline-block;">
        <label>Category</label>
        <br/>
        <select className="form-control" value={this.state.selectCategoryValue} onChange={this.handleSelectCat}>
            <option value="defaultCategory" disabled selected></option>{categoryDesc}</select>
    </div>
    <div className="form-group" style="display: inline-block">
        <label>Classification</label>
        <br/>
        <select className="form-control" value={this.state.selectClassificationValue} onChange={this.handleSelectClass}>
            <option value="defaultClassification" disabled selected></option>{this.state.classificationDesc}</select>
    </div></div>