$A$ is essential for the normal rate of hormone synthesis in the thyroid. Deficiency of iodine in our diet results in $B$ and enlargement of the thyroid gland,commonly called $C$. Select the correct combination for $A, B$,and $C$.

• A
  $A-Ferrous, B-goitre, C-hypothyroidism$
• B
  $A-Iodine, B-hypothyroidism, C-goitre$
• C
  $A-Ferric, B-goitre, C-hypothyroidism$
• D
  $A-Sodium, B-goitre, C-hypothyroidism$