anchor.diff:  
         <div class="form-group">
           <%= f.label :c_4, "С-4", class: "col-sm-2 control-label"  %>
  -        <div class="col-sm-1">
  +        <div class="col-sm-2 col-lg-1">
             <%= f.select :c_4, %w[0 1 2 3], {}, {class: "form-control"} %>
           </div>
         </div>
  
positive.code: 
        <div class="form-group">
          <%= f.label :a_3, "A-3", class: "col-sm-2 control-label"  %>
          <div class="col-sm-1">
            <%= f.select :a_3, %w[0 1 2 3 4], {}, {class: "form-control"} %>
          </div>
        </div>
  
        <div class="form-group">
          <%= f.label :a_4, "A-4", class: "col-sm-2 control-label"  %>
          <div class="col-sm-1">
            <%= f.select :a_4, %w[0 1 2 3], {}, {class: "form-control"} %>
          </div>
        </div>
  
negative.code: 
        <div class="form-group">
          <%= f.label :sex, "Пол", class: "col-sm-2 control-label" %>
          <div class="col-sm-2 col-lg-1">
            <%= f.select :sex, %w[М Ж], {}, {class: "form-control"} %>
          </div>
        </div>
  