Match List I (Malware type) with List II (Characteristic) and choose the correct answer from the options given below.
List I
i.Trapdoor
ii.Time bomb
iii.Polymorphic virus
iv.Macrovirus
List II
a.Creates multiple but operationally equivalent copies of itself
b.Code that allows for unnatural rapid access later
c.Instructions that are interpreted rather than executed
d.Produces an action at a specific time
Ai-a, ii-b, iii-c, iv-d
Bi-b, ii-d, iii-a, iv-c ✓ Correct
Ci-c, ii-a, iii-d, iv-b
Di-d, ii-c, iii-b, iv-a
Correct answer: (B) i-b, ii-d, iii-a, iv-c
Explanation
A trapdoor is hidden code that allows unnatural rapid access to a system later, bypassing normal security.
A time bomb produces its action at a specific preset time.
A polymorphic virus creates multiple but operationally equivalent copies of itself to evade detection.
A macrovirus consists of instructions that are interpreted rather than executed, riding inside document macros.
Each threat is grouped by how it activates or disguises itself.
A polymorphic virus changes its code pattern while keeping the same harmful behaviour.
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