Which of the following is the type of parallel processor system as per Flynn's…

Flynn's taxonomy classifies computer architectures by how many instruction streams and data streams a processor handles at once. Only the categories where a single instruction operates simultaneously on multiple data elements (or multiple instructions act at once) count as parallel; the single-instruction, single-data model has no such simultaneity and is the classic sequential design.

Statement I describes single instruction, single data (SISD): one control unit issues one instruction that acts on one data item at a time — the standard sequential/uniprocessor model, with no parallel execution. Statement II describes single instruction, multiple data (SIMD): one instruction is applied across many data elements simultaneously (e.g., a vector or array processor) — this is inherently parallel. Since the question asks specifically which of the two constitutes a parallel processor system, only the SIMD-type stream (statement II) qualifies; the SISD-type stream (statement I) does not, because it never operates on more than one data element at a time.

• “Neither I nor II” fails because Flynn's taxonomy does include a genuinely parallel category among the two listed streams.

• “Both I and II” fails because it wrongly promotes the single-instruction, single-data (sequential) stream to a parallel one.

• “Only I” fails because it selects exactly the non-parallel, sequential stream while dropping the stream that is actually parallel.