Which among the following is haloarene?

What is energy associated with fourth orbit of hydrogen atom?

$$\left(\mathrm{R}_{\mathrm{H}}=2.18 \times 10^{-18} \mathrm{~J}\right)$$

Identify glycosidic linkages for formation of chain and branches respectively in amylopectin.

Which from following species does not have number of electrons similar to other three species?