Which of the following diagram shows atoms are bonded with same electronegativity?

مندرجہ ذیل میں سے کون سا خاکہ دکھاتا ہے کہ ایٹم ایک ہی برقی منفیت کے ساتھ جڑے ہوئے ہیں؟

A -----:----- B

A ----------: B

A :---------- B

A --:-------- B

The diagram that shows atoms are bonded with the same electronegativity is: A -----:----- B.
In this representation, the bond is shown with a symmetrical distribution of electrons.
It suggesting that the atoms have the same or very similar electronegativity.