The correct option is C On a 29th
A leap year occurs only once in 4 years. And the leap day in a leap year is the 29th of February.
So, if Adam was born on the 29th of February, he would only get to celebrate his birthday every fourth year.
32÷4=8
Hence, if Adam was born on the 29th of February, he would only clebrate his birthday 8 times in 32 years.