There is relaxation in the age limit for candidates with a benchmark disability in the BPSC (Bihar Public Service Commission) exam vacancies. The detailed information regarding the relaxation in age limit for candidates with a benchmark disability is provided below:

Age Limit Relaxation for Candidates with Benchmark Disability:
The BPSC provides relaxation in the age limit for candidates with a benchmark disability as per the rules and regulations set by the government. The specific details are as follows:

1. Upper Age Limit Relaxation:
Candidates with a benchmark disability are eligible for upper age limit relaxation in accordance with the guidelines issued by the government. The relaxation in the upper age limit varies based on the category of the benchmark disability. The specific relaxations are as follows:

- General Category: Candidates with a benchmark disability belonging to the general category are provided with a certain number of years of relaxation in the upper age limit.
- SC/ST Category: Candidates with a benchmark disability belonging to the SC/ST category are provided with a higher number of years of relaxation in the upper age limit compared to the general category.
- OBC Category: Candidates with a benchmark disability belonging to the OBC category are also provided with a certain number of years of relaxation in the upper age limit.

It is important to note that the exact number of years of age relaxation may vary from year to year and can be subject to change based on the government's policies and notifications issued by the BPSC.

2. Documentary Evidence:
Candidates claiming relaxation in the age limit under the benchmark disability category are required to provide valid documentary evidence to support their claim. This evidence may include disability certificates issued by authorized medical boards or other relevant documents as specified by the BPSC.

3. Reservation of Vacancies:
In addition to the age limit relaxation, the BPSC also provides reservation of vacancies for candidates with benchmark disabilities. The percentage of reservation varies based on the category of the benchmark disability and is in accordance with the government's guidelines.

Conclusion:
In conclusion, candidates with a benchmark disability are eligible for relaxation in the age limit for BPSC exam vacancies. The specific relaxation varies based on the category of the benchmark disability and is subject to the rules and regulations set by the government. It is important for candidates to provide valid documentary evidence to support their claim for age relaxation and to stay updated with the notifications and guidelines issued by the BPSC.