如何在select元素中显示单击选项作为活动?

Whenever I select an option from select dropdown, it refreshes and the selected value is not displayed rather the first option is displayed everytime however it function according to the selected option. What I want is clicked option to be displayed inside select field rather than first option.

For instance;

<select id="trend" class="form-ct" name="gender_filter" onchange="this.form.submit();">
   <option value="M">Man</option>
   <option value="F">Woman</option>
   <option value="O">Other</option>   
</select>