the c button is L1

YOU CAN CHECK IT OUT IN THE OPTIONS MENU AND THEN CONTROLLER .BUT I CAN ALSO TELL YOU
P=SQAURE (P-PUNCH)
K=TRIANGLE (K-KICK)
E=CIRCLE (E- ENERGY BLAST)
G=X (G-GUARD )
C=L1 (DONT KNOW )
D=? (CHECK URSELF)
P+G= ?(CHECK URSELF)
B=?(CHECK URSELF)