Song's birthday is 300 days later. Since we have 7 days a week;
`300/7 = 7xx42+6`
So Song's birthday will arrive 42 weeks and 6 days after Sam's b'day. We know that Sam's birthday is on a Saturday. So six days after Saturday will be a Friday.
The correct answer is Friday. So none of the answers given here is not correct. Please recheck with your question.