Section A: Choose the correct answer for the given question from the options.
 
5. Sodium hydroxide is termed an alkali while Ferric hydroxide is not because:
 
a. Sodium hydroxide is a strong base, while Ferric hydroxide is a weak base.
b. Sodium hydroxide is a base which is soluble in water while Ferric hydroxide is also a base but it is not soluble in water.
c. Sodium hydroxide is a strong base while Ferric hydroxide is a strong acid.
d. Sodium hydroxide and Ferric hydroxide both are strong base but the solubility of Sodium hydroxide in water is comparatively higher than that of Ferric hydroxide.