(i) mineral acids are completely ionised

(ii) carboxylic acids are completely ionised

(iii) mineral acids are partially ionised

(iv) carboxylic acids are partially ionised

(a) (i) and (iv)

(b) (ii) and (iii)

(c) (i) and (ii)

(d) (iii) and (iv)

Answer: (a) (i) and (iv)

Reason: Mineral acids are much stronger than carboxylic acid because they are fully ionized minerals and carboxylic acids are partially ionized.