The faster, costlier and relatively small form of storage managed by computer system hardware is :

Explanation:

Option (c) Cache memory is the correct answer. Cache memory (L1, L2, L3) is the fastest, most expensive, and smallest type of memory in the hierarchy, located closest to the CPU to store frequently accessed data and instructions, thereby speeding up processing. Option (a) Main Memory (RAM) is slower, larger, and less expensive than cache. Option (b) Flash Memory is non-volatile storage, much slower than cache or RAM. Option (d) Disk (HDD/SSD) is the slowest, largest, and least expensive, used for mass storage.