Assertion: `NAND` or `NOR` gates are called digital building blocks.
Reason: The repeated use of `NAND` (or `NOR`) gates can produce all the basic or complicated gates.
A. Statement `-1` is false, statement `-2` is true
B. statement `1-` is true statement `-2` is true statement `-2` is correct explanation of statement `-1`.
C. statement `1-` is true statement `-2` is true statement `-2` is not correct explanation of statement `-1`
D. statement `1-` is true statement `-2` is false.
