Consider the following statements. The common features of the molecules ${\mathrm{BF}}_3$,${\mathrm{SF}}_6$ and $\mathrm{NO}$ are that
i) all contain odd electron bond
ii) all are gases at room temperature
iii) all contain unpaired electrons
iv) all do not confirm to the octet rule

Among the three molecules, only $\mathrm{NO}$ contains an odd electron bond. All three molecules are in the gaseous state at room temperature. Only NO contains unpaired electrons among three molecules. All three molecules ${\mathrm{BF}}_3$, ${\mathrm{SF}}_6$ and $\mathrm{NO}$ do not conform to the octet rule.
Hence, the correct answer is option (D).