I have two objects:

```
Inquiry
Patient

```

Patient has many inquiries so there is a lookup field on the inquiry object.

now here is my code:

```
Patient__c p = [Select Id from Patient__c where id='00QJ000000B4yXa'];
SObject container;
Schema.sObjectType sType = Schema.getGlobalDescribe().get('inquiry__c');
container = sType.newSObject();

```

I need a way to get the name of the lookup field on the child object .

in this example I would need the patient\_\_c fieldname on the child record