The correct option is B 10
Correct answer: (c) 10
In kingdom Animalia, usually 10 phyla are included, they are as follows:
A. Porifera
B. Cnidaria
C. Platyhelminthes
D. Nematoda/Aschelminthes
E. Annelida
F. Arthropoda
G. Mollusca
H. Echinodermata
I. Protochordata
J. Vertebrata