Choosing a Different Optional Subject for UPSC Mains Exam


In the UPSC (Union Public Service Commission) mains exam, candidates are required to choose one optional subject from a list of subjects provided by the commission. This subject carries a significant weightage in the overall marks obtained in the mains exam. However, there might be instances where a candidate wishes to change their optional subject after initially selecting one. Let's explore the possibilities and procedures involved in choosing a different optional subject for the mains exam.


The selection of an optional subject is done during the application process for the preliminary exam. Once the candidate has chosen Zoology as their optional subject for the preliminary exam, they are bound to it for the mains exam as well unless they meet certain conditions. However, there are a few circumstances under which a change in the optional subject can be considered.

1. Valid Reasons
Candidates can request a change in their optional subject if they have valid reasons for doing so. Some valid reasons include:

- Genuine interest: If the candidate has a genuine interest in another subject and believes it will enhance their performance in the mains exam, they can request a change.
- Lack of resources: If the candidate faces difficulties in accessing study materials or resources for their chosen subject, they can opt for a subject for which they have better resources.
- Personal circumstances: In case of any unforeseen personal circumstances, such as health issues or family emergencies, the candidate can request a change in the optional subject.

2. Approval from UPSC
In order to change the optional subject, candidates need to seek approval from the UPSC. They can write a formal letter explaining their reasons for the change and submit it to the commission. The decision to allow the change lies solely with the UPSC, and they may or may not grant the request based on the validity of the reasons provided.

3. Timely Request
It is important for candidates to submit their request for a change in the optional subject within the stipulated time frame set by the UPSC. Failing to do so may result in their request being rejected.


While it is possible to choose a different optional subject for the UPSC mains exam after selecting Zoology in the preliminary exam, it is subject to certain conditions. Candidates must have valid reasons for the change and seek approval from the UPSC. It is advisable to make such a request within the specified time frame. It is important to note that the final decision lies with the UPSC, and they will consider the merits of the request before granting or denying the change.