The circuit shown in the figure has 4 boxes each described by inputs P, Q, R and outputs Y, Z with $${\text{Y}} = {\text{P}} \oplus {\text{Q}} \oplus {\text{R,}}\,\,{\text{Z}} = {\text{RQ}} + \overline {\text{P}} {\text{R}} + {\text{Q}}\overline {\text{P}} $$
The circuit acts as a

A. 2TTL B. 5TTL C. 8TTL D. 10TTL

A. NAND gate B. OR gate C. AND gate D. None of the above

A. 6 B. 32 C. 64 D. 128

A. Base 10 B. Base 16 C. Base 8 D. Base 3