Hi!

You can use an MDBFormInline component. I.e.:

JSX:

import React, { Component } from "react";
import {
  MDBContainer,
  MDBRow,
  MDBCol,
  MDBInput,
  MDBFormInline,
} from "mdbreact";
import "./index.css";

class App extends Component {
  render() {
    return (
      <MDBContainer className="mt-5">
        <MDBRow className="justify-content-center">
          <MDBCol md="6">
            <MDBFormInline>
              <MDBInput
                label="Material 1"
                name="form1"
                type="radio"
                id="checkbox3"
              />
              <MDBInput />
            </MDBFormInline>
          </MDBCol>
        </MDBRow>
      </MDBContainer>
    );
  }
}

export default App;

CSS (index.css):

.form-control {
    height: 20px;
    width: auto;
}

.form-check-input {
    margin-top: 0;
}

Keep coding!