Yes, there is provision for the registration of widows in the BPSC Assistant Professor Exam. The Bihar Public Service Commission (BPSC) recognizes the special circumstances faced by widows and provides certain relaxations and benefits for their registration in the exam. Here are the details:

Eligibility Criteria for Widows:
To be eligible for the registration as an Assistant Professor, widows need to fulfill the following criteria:

1. Educational Qualification: Widows should possess the required educational qualifications as specified by the BPSC. This usually includes a postgraduate degree in the relevant subject with at least 55% marks.

2. Age Limit: The age limit for widows is generally relaxed as per the BPSC rules. While the maximum age limit for general candidates may be around 37 years, widows may be given an extended age relaxation of up to 42 years or as specified by the commission.

Reservation for Widows:
The BPSC also provides reservation for widows in the Assistant Professor Exam. The reservation category for widows may vary depending on the government policies and guidelines. Generally, widows are considered under the category of "Women with Benchmark Disabilities" or "Widows/Wives of Armed Forces Personnel/Ex-Servicemen".

Document Requirements:
Widows who wish to register for the BPSC Assistant Professor Exam need to provide certain documents as proof of their widowhood. These documents may include:

1. Death Certificate of the spouse
2. Marriage Certificate
3. Widow Pension Certificate (if applicable)
4. Affidavit or any other relevant document as specified by the commission

It is important for widows to carefully read the official notification of the BPSC Assistant Professor Exam for the specific document requirements and instructions.

Registration Process:
The registration process for widows is generally the same as for other candidates. They need to visit the official website of the BPSC and follow the instructions for the online application. The application form may have specific fields or checkboxes to indicate widowhood, and widows should provide the necessary details and upload the required documents.

Conclusion:
In conclusion, the BPSC Assistant Professor Exam recognizes the special circumstances of widows and provides provisions for their registration. Widows are eligible for age relaxation and reservation benefits. They need to fulfill the educational qualifications, provide the necessary documents, and follow the registration process as specified by the commission. It is advisable for widows to carefully read the official notification and guidelines for accurate and up-to-date information.