Which is the common ancestor of old world monkeys, apes and humans?

Explanation

To answer the question of which is the common ancestor of old world monkeys, apes, and humans, we can follow these steps:

### Step-by-Step Solution:

1. **Understanding the Groups**:
- First, we need to understand the classification of primates. Old World monkeys, apes, and humans all belong to the primate order. Old World monkeys are distinct from New World monkeys, primarily in their physical features.

2. **Identifying Characteristics**:
...