How many RAM chips of size $(256K \times 1 \text{ bit})$ are required to build $1$M Byte memory?
Similar question : https://gateoverflow.in/1299/gate2009-7-isro2015-3
Number of RAM chips $=$ $\frac{Total Size}{OneRAMSize}$
$\Rightarrow$ $\frac{2^{20}*8}{2^{8}*2^{10}}=\frac{2^{23}}{2^{18}}=2^{5}=32$
D is correct.
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