The correct option is A 15
The number of slices of pizza form a pattern.
The sequence is 3, 6, 9, 12.
Difference between the 1st and the 2nd terms = 6 - 3 = 3
Difference between the 2nd and the 3rd terms = 9 - 6 =3
Hence, to get the next term, 3 should be added to a term.
Hence, the next term in the sequence is 12 + 3 = 15
Hence, 15 slices of pizza will be there in 5 plates.