Question

Fill in the blank with appropriate compound or phrase prepositions:
Sorry, I could not come to your birthday party ___ my brother's sudden illness.

• A. In lieu of
• B. In favour of
• C. Because of
• D. In case of

Answer 1

The correct option is C Because of

Here, 'because of' is incorrect because it is used before a noun or noun phrase to say that somebody/something is the reason for something.
'In lieu of' is incorrect because it implies instead of.
If you are 'in favour of' somebody/something, you support and agree with them/it.
'In case of' is incorrect because it implies if something happens.