Okay, let's try to figure out this question. The scenario is a child who beats his sibling, gets beaten by his father, and then stops beating the sibling. The question is asking about the line of management here.

First, I need to recall different psychological or behavioral theories. The options probably relate to operant conditioning concepts like positive reinforcement, negative reinforcement, punishment, etc.

In operant conditioning, punishment is used to decrease a behavior. There are two types: positive punishment (adding something unpleasant) and negative punishment (removing something pleasant). In this case, the father is giving the child a beating (which is an aversive stimulus) after the undesirable behavior (beating the sibling). The child stops the behavior, so this would be a form of punishment.

Wait, but is it positive or negative punishment? Positive punishment adds an aversive stimulus. Here, the father's beating is added, so that's positive punishment. The child's behavior decreases because of the added consequence.

Now, looking at the options, if the correct answer is punishment, then the other options might be reinforcement. For example, if someone was rewarded for good behavior, that's positive reinforcement. Negative reinforcement would involve removing something unpleasant after a desired behavior.

So the wrong options would be things like positive reinforcement, negative reinforcement, or maybe extinction.

The clinical pearl here is that punishment decreases the behavior, but it's important to note that punishment can have side effects like fear or aggression. However, in this scenario, the question is straightforward about the type of management used.

Putting it all together: the father's action is an example of positive punishment. The correct answer would be the option that states positive punishment. The other options are incorrect because they either involve reinforcement (which is for increasing behavior) or different types of punishment.

**Core Concept** This scenario illustrates principles of operant conditioning, specifically punishment as a behavior modification technique. Positive punishment involves administering an aversive stimulus to reduce the frequency of an unwanted behavior.

**Why the Correct Answer is Right** The father administers a beating (aversive stimulus) immediately after the child's aggressive behavior, leading to its cessation. This aligns with **positive punishment**, where an unpleasant consequence is introduced to suppress undesirable actions. The child associates the aggressive act with pain, thus reducing future occurrences.

**Why Each Wrong Option is Incorrect**
**Option A:** *Positive reinforcement* is incorrect because it involves rewarding a desired behavior to increase its frequency (e.g., praising good behavior).
**Option B:** *Negative reinforcement* is incorrect because it removes an aversive stimulus to encourage a behavior (e.g., stopping a scolding after obedience).
**Option C:** *Extinction* is incorrect because it refers to withholding reinforcement for a previously rewarded behavior, not introducing punishment.

**Clinical Pearl / High-Yield Fact** Punishment (positive or negative) reduces unwanted behaviors but may lead to resentment or fear. Operant conditioning principles are foundational in child psychiatry and behavioral therapy, with punishment often used cautiously alongside reinforcement strategies.

**Correct Answer: D. Positive punishment**

✓ Correct Answer: B. behavioural therapy