JEE Main 2014 · 19 Apr · Shift 1, Chemistry question 47

All four statements are in fact true:

• $\ce{NO+}$ has 14 electrons and $\ce{O2}$ 16, so they are not isoelectronic.
• Boron forms only covalent compounds.
• $\ce{Tl+}$ is more stable than Tl(III) (inert pair effect).
• $\ce{LiAlH4}$ is a versatile reducing agent.

With no false statement to pick, the question was given marks to all.