Formula of sodium lauryl sulphate is—

• a$\mathrm{C_{12}H_{25}SO_4Na}$
• b$\mathrm{C_{17}H_{35}COONa}$
• c$\mathrm{C_{12}H_{25}COONa}$
• d$\mathrm{C_{12}H_{25}OH}$