If you are asking which bayonet would have been issued to a soldier in the time frame that the Garand was issued, the answer is one of several possibilities.
1. Any Model of 1905 which was designed for the 1903 Springfield and produced from 1906 to 1922 by Rock Island Arsenal and Springfield Armory. The bayonets originally had wooden grips, and were dated and had serial numbers.
2. Any Model of 1905, second production period from 1942 to 1943 by six different contractors. Since your Garand was made in 1942, it was likely issued in 1942 so a 1942 dated bayonet would be correct.
3. If for some reason your Garand was not issued until 1943, then one of the modified early versions of the 1905 bayonet would be possible. These bayonets were modified by cutting off the tip so the blade was 10". These bayonets were modified in 1943 and 1944.
4. Again, if your Garand was issued in 1943, then a model
M1 bayonet could have been issued. Production of the model M1 began in 1943.
The M5 and M5A1 bayonets were produced beginning in 1953.
Ref.: American Military Bayonets of the 20th Century by Gary M. Cunningham