Which bomb category is not suitable for target penetration?

The category identified does not facilitate target penetration due to its design and intended purpose. Blast bombs are primarily designed to create a powerful explosive effect over a wide area. Their function is to maximize damage through shock waves and blast effects, making them more effective against soft targets or for area denial rather than penetrating hardened structures.

In contrast, fragmentation bombs are intended to scatter lethal fragments over a broad area upon detonation, which is useful for anti-personnel or soft-target applications. Penetration bombs are specifically designed to pierce through hard surfaces, often equipped with specialized shapes and materials to allow them to penetrate bunkers or fortified structures. General-purpose bombs have versatile applications and may also include capabilities for penetration, depending on their design.

Thus, due to the blast bombs' focus on explosive yield and shock wave creation rather than penetrating capabilities, they do not fit into the category suitable for target penetration.