How to convert OID dat type to XML in postgres?

I'm using Postgres 9.5.

This is my Postgres Table.

create table testXml(XmlFile xml);

I have an XML file in my local Folder.

<?xml version="1.0" ?><Student><Id>1</Id><Marks>275</Marks><Rank>2</Rank></Student>

I want insert the file into my table. I can able to insert the file when it located in the data directory.

I found an alternate way but it returns OID value:

SELECT lo_import('/home/dinesh/Desktop/test.xml');

When runs this, it gives the result : 17994

But I need the XML value as my result.

I can't able to find a clear solution to convert the OID to XML value.

Please help me to get the correct result.

Thanks in Advice.