Read the given passage.
Charulata contracted chickenpox few days back and soon recovered from the infection. She got immune to any subsequent infection of chickenpox virus. Her younger brother Ajeet is just two months old and is mother fed. He has received some immunity from his mother via milk. Which of the following is correct regarding Charulata and Ajeet's immunity?

Options

A. Charulata's immune system has developed its own antibodies when encountered the pathogen or antigen, however Ajeet has received preformed antibodies from his mother.
B. Ajeet's immunity is long lasting but Charulata's immunity is for a brief period only.
C. Charulata is also immune to diseases like measles and polio, however Ajeet is immune to most of the pathogenic diseases.
D. Ajeet's immunity may cause some side effects in his body, however Charulata's immunity has no side effects.

Answer

To solve the question regarding the immunity of Charulata and Ajeet, we can break down the information provided in the passage step by step.

### Step 1: Understand the Immunity Types
- **Active Immunity**: This occurs when an individual’s immune system is exposed to a pathogen and produces antibodies in response. This is what happened to Charulata when she contracted chickenpox. Her body created antibodies against the chickenpox virus, making her immune to future infections.

- **Passive Immunity**: This occurs when an individual receives antibodies from another source rather than producing them themselves. Ajeet, being only two months old and breastfed, received preformed antibodies from his mother through her milk. This is a temporary form of immunity.

### Step 2: Analyze Charulata's Immunity
- Charulata contracted chickenpox and recovered, which means her immune system actively fought the infection and developed antibodies specific to the chickenpox virus. This is classified as **active immunity**.

### Step 3: Analyze Ajeet's Immunity
- Ajeet, on the other hand, has not been exposed to the chickenpox virus himself. Instead, he has received antibodies from his mother through breastfeeding. This is classified as **passive immunity**.

### Step 4: Compare the Duration of Immunity
- Active immunity (Charulata's) can last for a long time but may not be permanent. It is specific to the pathogen that caused the infection.
- Passive immunity (Ajeet's) is generally short-lived, as the antibodies received from the mother will eventually degrade and not be replaced by the infant’s immune system.

### Step 5: Conclusion
- The correct statement regarding Charulata and Ajeet's immunity is that Charulata has active immunity developed from her own immune response, while Ajeet has passive immunity received from his mother.