Given below are two statements: One is labelled as Assertion A and the other is labelled as Reason R.

Assertion A: Butan -1- ol has higher boiling point than ethoxyethane.

Reason R: Extensive hydrogen bonding leads to stronger association of molecules.

In the light of the above statements, choose the correct answer from the options given below:

Which of the following complex is octahedral, diamagnetic and the most stable?

The correct order of electronegativity for given elements is:

The correct order of spin only magnetic moments for the following complex ions is