Only show first entity reference in views
This is how i did it :


In Views, under Advanced, add Entity Reference:Referencing entity relationship via your reference field id.
In Views, under fields add the field(in this case - Body) and add the above relationship .


Note: If there are nodes of content type B that reference same nodes of content type A, those same nodes of content type A will be duplicated in the views with different values of the fields of content type B that is referencing them.

Update: To remove such duplicates, you can use Views Distinct module and then in Views under fields, select Title field(Content Type A) and under Views Distinct Settings, change to 'Filter Repeats' for Filter/Aggregate this field and save.