Option (a) is not correct: Deva Gati (Celestial/Gods) is one of the four recognized realms of existence. It represents heavenly beings who possess supernatural powers and enjoy immense pleasures, though they cannot achieve direct liberation from this state.
Option (b) is correct: Yaksha (demi-gods) is not included as one of the four main independent forms of existence (Gatis). In Jain cosmology, Yakshas and Yakshinis are classified as protective deity figures or attendant spirits (Shasana Devatas). They are considered a sub-category or resident entity belonging inside the broader Deva Gati (specifically under the Vyantara class of celestial beings).
Option (c) is not correct: Manushya Gati (Humans) is one of the four main realms. It is considered the most critical state of existence because Moksha (liberation) can only be attained from the human form.
Option (d) is not correct: Tiryancha Gati (Animals and Plants) is one of the four main realms. It is a broad category that encompasses all non-human, non-celestial, and non-hellish living beings, ranging from one-sensed organisms (like plants, water, and earth) to multi-sensed birds and animals.
Source: https://jainworld.com/languages/jw-in-world-languages/serbia/self-learning-lessons-for-juniors/gati/
The Notification for the Civil Services Examination, 2021 was released by the Commission on March 04, 2021. The notification contains all the details related to the examination dates, number of vacancies, eligibility criteria, syllabus, application process, fee, exam centers etc. The exam is being conducted to fill in 712 vacancies as listed in the notification with 22 vacancies reserved for Persons with Benchmark Disability. The Preliminary examination will be held on October 10 2021. Candidates can visit the Commission’s website  to fill the application form. Detailed instructions for filling up online applications have been provided on the website. The application window was closed on March 24 2021. The admit cards for the Preliminary Examination were made available from September 16 2021. The admit cards can be downloaded from the Commission’s website on the above mentioned link.