Mr. Gessler lived with his –
a) Mother
b) Little brother
c) Elder brother
d) Both b and c

The correct answer is option C, which means Mr. Gessler lived with his elder brother.

Explanation:
Mr. Gessler's living arrangements are mentioned in the question, and we need to determine who he lived with. Let's examine the options:

Option A: Mother
This option states that Mr. Gessler lived with his mother. However, the question specifically mentions that he lived with his brother, so this option can be ruled out.

Option B: Little brother
This option suggests that Mr. Gessler lived with his little brother. However, the question states that he lived with his elder brother, so this option can also be ruled out.

Option C: Elder brother
This option states that Mr. Gessler lived with his elder brother. This aligns with the information provided in the question, making it the correct answer.

Option D: Both b and c
This option suggests that Mr. Gessler lived with both his little brother and his elder brother. However, this contradicts the information provided in the question, which states that he lived with his elder brother. Therefore, this option can be ruled out as well.

In conclusion, Mr. Gessler lived with his elder brother, as stated in the question.