Which of the following statements is true with regard to hydrogen?i. Hydrogen reacts to attain a duplet of electrons in its K shell.ii. Hydrogen always forms a single covalent bond.iii. Hydrogen can form a single and a double covalent bond.
A. (i) B. (i) and (ii) C. (i) , (ii) and (iii) D. (i) and (iii)