B.with which she was absolutely delighted✓ Correct
C.of which she was absolutely delighted
D.on which she was absolutely delighted
Explanation
The standard English collocation is 'delighted with' something. When someone is pleased with a gift or item, we use 'delighted with'. Therefore, the relative clause should be 'with which she was absolutely delighted'. 'Delighted for' is used for someone's happiness about another person; 'delighted of' and 'delighted on' are not standard collocations.
💡 Practice unlimited NDA PYQs + AI-tracked progress on each topic. Sign up free →