Views duplicate result if multiple entity reference
I figured out good solution which is as follow:
-A is the content type &amp; B is the second content type
-A is field entity reference in the content type of A with multiple values.
-in the views in creating view of content type B just render the field of entity reverence A normally, by default it will render the title whether its 1 value or more. 
-now the views for this field in formatter option choose Rendered Entity.
-and in view mode we can choose Tokens.
-now we got to the content type A and then go to manage display tab.
-at the bottom left in the menu click on Custom display settings and then check the option Tokens and click save.
-now in the top right tab "Tokens" display will appear, click on it.
-now we choose which field we want to appear in the view &amp; we can control the label, value, the format. for my case i just showed 1 field without the label and with plain text format and thats was great enough with out making relation and duplicate the content.