Match List I with List II. List I: P cetyltrimethylammonium bromide; Q polyethylene glycol stearate; R sodium dodecylbenzenesulphonate. List II: 1 anionic, sulphonate head, biodegradable when the chain is linear; 2 cationic, quaternary ammonium head, used in hair conditioners; 3 non-ionic, ester link, used in liquid dishwashing.

AP-1, Q-2, R-3
BP-3, Q-1, R-2
CP-2, Q-3, R-1
DP-2, Q-1, R-3

Answer: C

Cetyltrimethylammonium bromide has a quaternary ammonium cation head (2). Polyethylene glycol stearate is an ester with no charge (3). Sodium dodecylbenzenesulphonate is the anionic sulphonate (1). So P-2, Q-3, R-1.

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