# Minimum number of complementary CMOS to implement $F=ABC+\overline{(A+B+C)}$?

Minimum number of complementary CMOS transistors pair will be required to implement function,$F=ABC+\overline{(A+B+C)}$ are?

$(A)6$

$(B)7$

$(C)8$

$(D)9$

I tried like this but I am getting 7 CMOS pair but answer key says its 9 CMOS pair.whats the mistake I am doing?