Download The Plugin Collapse-O-Matic
Go to the Dashboard add a new plugin and search Collapse-O-Matic and Install and Activate the Plugin, Collapse-O-Matic you can also download this plugin from the wordpress.org, go to this website and search Collapse-O-Matic in the Plugin section and Download in Your Computer than Go to WordPress dashboard and Add New Plugin and Click on Upload and Activate after Install the Plugin.
CSS for Online MCQ, Question Answer Blog
Copy this code in the customization and paste it into the Additional CSS Box.
.collapseomatic, .colomat_trigger, .collapseall, .expandall, .setall
{
-moz-box-shadow: inset 0px 1px 0px 0px #fff6af;
-webkit-box-shadow: inset 0px 1px 0px 0px #fff6af;
box-shadow: inset 0px 1px 0px 0px #fff6af;
background: -webkit-gradient(linear, left top, left bottom, color-stop(0.05, #ffec64), color-stop(1, #ffab23));
background: -moz-linear-gradient(top, #ffec64 5%, #ffab23 100%);
background: -webkit-linear-gradient(top, #ffec64 5%, #ffab23 100%);
background: -o-linear-gradient(top, #ffec64 5%, #ffab23 100%);
background: -ms-linear-gradient(top, #ffec64 5%, #ffab23 100%);
background: linear-gradient(to bottom, #ffec64 5%, #ffab23 100%);
background-color: #ffec64;
-moz-border-radius: 6px;
-webkit-border-radius: 6px;
border-radius: 6px;
border: 1px solid #ffaa22;
display: inline-block;
cursor: pointer;
color: #333333;
font-weight: bold;
padding: 6px 24px;
text-decoration: none;
text-shadow: 0px 1px 0px #ffee66;
text-transform: none;
letter-spacing: normal;
font-family: "Helvetica Neue",Helvetica,Arial,sans-serif;
}