Statement I: Sodium hydride can be used as an oxidising agent.
Statement II: The lone pair of electrons on nitrogen in pyridine makes it basic.
Choose the CORRECT answer from the options given below:

Statement I says sodium hydride (NaH) can be used as an oxidising agent. In NaH, hydrogen is in the $$-1$$ oxidation state. To act as an oxidising agent, hydrogen would need to gain electrons (become more negative), but it is already at its lowest oxidation state of $$-1$$. Instead, NaH acts as a strong reducing agent, as $$H^-$$ readily donates electrons to become $$H_2$$ (oxidation state 0). Therefore, Statement I is false.

Statement II says the lone pair of electrons on nitrogen in pyridine makes it basic. Pyridine has a nitrogen atom with a lone pair in an $$sp^2$$ hybrid orbital that lies in the plane of the ring and is not part of the aromatic $$\pi$$ system. This lone pair is available to accept a proton ($$H^+$$), making pyridine a base. Therefore, Statement II is true.

Since Statement I is false and Statement II is true, the correct answer is option (3).