How many of the following metals give oxides and nitrides when burnt in air? $\mathrm{Be}, \mathrm{Na}, \mathrm{Mg}, \mathrm{Ba}, \mathrm{Sr}, \mathrm{Li}, \mathrm{K}$

• A

  2
• B

  3
• C

  4
• Correct answer
  D

  5

Hence, the correct answer is option: 'D'.