How to get selected only single checkbox from multiple checkboxes using ionic 2 and angular2

Presently working on ionic2 and angular2 I am having fields of 7 checkboxes. I need to select only one particular checkbox the remaining checkboxes should be disabled.Similarly, I need to get for remaining 6 checkboxes also. How can I do that, Here is the code I have used in my HTML

// payment.HTML

<ion-card class="ion-card">
        <ion-item>
            <ion-label>Cash On Delivery</ion-label>
            <ion-checkbox item-right checked="true" [(ngModel)]="checked"></ion-checkbox>
        </ion-item>

        <ion-item no-lines>
            <ion-label>PayuMoney Wallet</ion-label>
            <ion-checkbox item-right  checked="false"[(ngModel)]="checked"></ion-checkbox>
        </ion-item>

        <ion-item no-lines>
            <ion-label>Pay with Paytm Wallet</ion-label>
            <ion-checkbox item-right checked="false" [(ngModel)]="checked"></ion-checkbox>
        </ion-item>

        <ion-item no-lines>
            <ion-label>Credit/ Debit Card</ion-label>
            <ion-checkbox item-right checked="false" [(ngModel)]="checked"></ion-checkbox>
        </ion-item>

        <ion-item no-lines>
            <ion-label>Net Banking</ion-label>
            <ion-checkbox item-right checked="false" [(ngModel)]="checked"></ion-checkbox>
        </ion-item>

        <ion-item no-lines>
            <ion-label>PayZapp</ion-label>
            <ion-checkbox item-right checked="false" [(ngModel)]="checked"></ion-checkbox>
        </ion-item>

        <ion-item no-lines>
            <ion-label>Pay using MobiKwiK Wallet</ion-label>
            <ion-checkbox item-right checked="false" [(ngModel)]="checked"></ion-checkbox>
        </ion-item>

    </ion-card>