Choose the part of the sentence that contains an error:
I prefer tea than coffee.

Correct option is D

Option (d) contains an error.
Explanation: With the verb prefer, the correct comparative preposition is “to”, not “than.” The standard structure is prefer + noun/gerund + to + noun/gerund. Therefore, the sentence should read: “I prefer tea to coffee.”
Grammatical rule used: Prefer takes “to” for direct comparison (prefer A to B). When using the pattern with rather than, the structure is prefer to V₁ rather than V₂ (bare infinitive after rather than).
Example:
• She prefers classical music to pop.
• I prefer to read rather than watch TV.
Information booster / exceptions:
· Prefer vs would rather: I would rather drink tea than coffee (note than with would rather; but to with prefer).
· With gerunds: They prefer walking to driving .