Q.Which of the following is NOT a direct expense, and hence does not appear in the Trading Account?

Direct expenses are only those that bring goods into a saleable condition inside the business premises; expenses on getting goods OUT to customers are a different category.

Option (c) is correct. Carriage Outward (freight paid on sending goods OUT to customers after a sale) is a selling expense, charged in the Profit and Loss Account — it plays no part in bringing goods into the business or into a saleable state, so it is never a Trading Account item. Option (a) Wages, option (b) Carriage Inward, and option (d) Octroi on purchases are all genuine direct expenses — they are incurred to bring goods (or materials) into the business and into a condition ready for sale, and all three correctly belong in the Trading Account.

Confusing Carriage Inward (a direct/Trading Account expense, on purchases) with Carriage Outward (an indirect/P&L expense, on sales) purely because both contain the word 'Carriage'.