Derry developed an inferiority complex because of his burnt face. This means that option 'C' is the correct answer. Let's explore this in more detail.

Explanation:
1. Introduction:
Derry's inferiority complex can be attributed to the fact that he had a burnt face. This physical disfigurement likely had a significant impact on his self-perception and how he believed others perceived him.

2. Definition of an inferiority complex:
An inferiority complex refers to a persistent feeling of being inferior to others. It is a psychological condition in which an individual believes they are inadequate, worthless, or less capable than others. This can stem from various factors such as physical appearance, social status, or personal achievements.

3. Impact of a burnt face:
Having a burnt face can lead to feelings of shame, embarrassment, and self-consciousness. Society often places a high value on physical beauty, and any deviation from societal norms can lead to a sense of inferiority. Derry's burnt face likely made him stand out and feel different from his peers, which contributed to his inferiority complex.

4. Comparison to others:
Derry may have compared himself to others and felt that his burnt face made him less attractive or desirable. This constant comparison to others who did not have physical disfigurements could have fueled his feelings of inferiority.

5. Social interactions:
Interacting with others can be challenging for individuals with physical disfigurements. Derry may have experienced judgment or negative reactions from others, leading to a belief that he was inferior. These negative experiences can further reinforce an inferiority complex.

6. Psychological impact:
The psychological impact of having a burnt face can be profound. Derry may have developed a negative self-image, low self-esteem, and a lack of confidence in social situations. These psychological factors can contribute to an inferiority complex.

7. Insecurity and self-doubt:
Derry's inferiority complex may have manifested as insecurity and self-doubt. He may have doubted his abilities, felt unworthy of success or love, and constantly sought validation from others. These feelings can significantly impact one's overall well-being and quality of life.

8. Overcoming an inferiority complex:
It is important to note that an inferiority complex can be overcome with proper support, therapy, and self-reflection. By challenging negative beliefs, building self-esteem, and focusing on personal strengths, individuals like Derry can develop a more positive self-image and improve their overall mental well-being.

In conclusion, Derry's inferiority complex developed due to his burnt face, which made him feel different from others and triggered feelings of inadequacy. It is essential to approach individuals with physical disfigurements with empathy, understanding, and support to help them overcome their insecurities and develop a positive self-image.