How can I pass multiple selection field value via crm add contact api?

How can I pass multiple selection field value via crm add contact api?

I am using your zoho crm REST api for managing contact in crm.

And I added custom multiple selection choice field in zoho crm contact layout.

How can I pass multiple selection field value via crm add contact api?

Please give me demo of xml string to pass multiple selection field value to contact api.