I am using angular-material select to create a drop-down where I have provided options to select multiple values.

 <accordion [showArrows]=true class=programstyle>

          <accordion-group heading=EVENTS [isOpened]=true>

            <div class=>

              <mat-form-field class=width100>

                <mat-select class=width100 placeholder=Events [(ngModel)]=studentInput.programType (change)=filter() id=programTypeValueId name=programTypeValueId>

                    <mat-option disabled>Select Events</mat-option>

                  <mat-option *ngFor=let program of programs [value]=program.campusEventId>{{program.eventName}}

                  </mat-option>

                </mat-select>

              </mat-form-field>

            </div>

          </accordion-group>

          <accordion-group heading=SKILLS>

            <div class=>

              <mat-form-field class=width100>

                <mat-select multiple class=width100 placeholder=Select Skills [(ngModel)]=studentInput.skills (change)=filter()  id=skillTypeValueId name=skillTypeValueId>

                  <mat-option disabled>Select Skills</mat-option>

                  <mat-option *ngFor=let skill of skills [value]=skill.lookupValueId>{{skill.lookupValue}}

                  </mat-option>

                </mat-select>

              </mat-form-field>

            </div>

          </accordion-group>

          <accordion-group heading=INTERESTS>

            <div class=>

              <mat-form-field class=width100>

                <mat-option>Select Interests</mat-option>

                <mat-select multiple class=width100 placeholder=Select Interests  [(ngModel)]=studentInput.interest (change)=filter() id=interestTypeValueId

                  name=interestTypeValueId>

                  <mat-option *ngFor=let interest of interests [value]=interest.lookupValueId>{{interest.lookupValue}}

                  </mat-option>

                </mat-select>

              </mat-form-field>

            </div>

          </accordion-group>

        </accordion>

This the HTML part.

I have used Select Events in order to define option as Select Events. But i am getting this with checkbox enabled. I don't want the first option in the drop-down to have check-box enabled. Is there any way i can have first option with no-checkboxes?