Some Basic Concepts Of Organic Chemistry

(i) \(\mathrm{F}_3 \mathrm{C}-\mathrm{COOH}\), (ii) \(\mathrm{CH}_3 \mathrm{COOH}\),
(iii) \(\mathrm{C}_6 \mathrm{H}_5 \mathrm{COOH}\), (iv) \(\mathrm{CH}_3 \mathrm{CH}_2 \mathrm{COOH}\)
Correct order of \(\mathrm{p} K_a\) value is