You are two brothers and you are the elder. So you-

1. ক. precede your brother: "Precede" means to come before something in time or order. In the context of siblings, the elder brother was born before the younger brother, so he precedes his brother in age and possibly in other aspects of life as well. This option correctly reflects the relationship between the elder and younger brothers.

2. খ. succeed your brother: "Succeed" means to come after someone or something and take their place. While this word can be used in a broader sense, such as succeeding someone in a position or role, it doesn't accurately describe the relationship between siblings based on birth order. In the context of siblings, the elder brother does not succeed his brother; rather, he comes before him.

3. গ. supersede your brother: "Supersede" means to take the place of something or someone that is considered to be outdated or no longer effective. While the elder brother may hold authority or influence over the younger brother in some cases, the term "supersede" implies a replacement or displacement, which doesn't accurately represent the relationship between siblings based on birth order.

4. ঘ. none: This option suggests that none of the provided choices accurately describe the relationship between the elder and younger brothers. However, option ক, "precede your brother," accurately reflects the chronological order of birth and the relationship between siblings.

Based on the rules of language and the context of being the elder brother, option ক, "precede your brother," is the most appropriate choice.