Verilog Version 1.0: IEEE Standard 1364-1995
Verilog is a hardware description language (HDL) used to model and design digital systems. It was first developed by Gateway Design Automation in the early 1980s and later standardized by the Institute of Electrical and Electronics Engineers (IEEE) as IEEE Standard 1364.

Understanding the options:
a) IEEE standard 1394-1995: This standard refers to IEEE 1394, which is the FireWire interface standard. It is not related to Verilog.

b) IEEE standard 1364-1995: This standard is the correct answer. It refers to the first version of the Verilog hardware description language.

c) IEEE standard 1394-2001: This standard still refers to IEEE 1394, the FireWire interface standard. It is not related to Verilog.

d) IEEE standard 1364-2001: This standard refers to the second version of the Verilog hardware description language. It is not the correct answer.

Verilog Version 1.0: IEEE Standard 1364-1995
Verilog Version 1.0, specified by IEEE Standard 1364-1995, was the initial release of the Verilog hardware description language. This version introduced the basic features and syntax of Verilog, allowing engineers to describe digital systems using a high-level language.

Key features of Verilog Version 1.0:
- Behavioral modeling: Verilog Version 1.0 introduced behavioral modeling constructs, such as always blocks and procedural assignments, which allowed designers to describe the functionality of digital systems.

- Gate-level modeling: This version also supported gate-level modeling, enabling designers to describe digital circuits using basic logic gates.

- Hierarchical design: Verilog Version 1.0 supported hierarchical design, allowing designers to build complex systems by hierarchically organizing modules.

- Simulation and synthesis: This version provided simulation and synthesis capabilities, allowing designers to verify and synthesize their designs.

- Timing and delay modeling: Verilog Version 1.0 included timing and delay modeling features, enabling designers to model and simulate the propagation delays in their digital systems.

Conclusion:
Verilog Version 1.0 corresponds to IEEE Standard 1364-1995. This version introduced the fundamental features and syntax of the Verilog hardware description language, enabling engineers to describe and simulate digital systems.