The correct answer is option 'D', None of these.

Explanation:
The third stage of motor development in a child is not limited to a specific age range. Motor development refers to the progression of a child's ability to control and coordinate their physical movements. It includes both gross motor skills, which involve large muscle groups and the whole body, and fine motor skills, which involve smaller muscle groups and precise movements.

Motor development progresses in a sequential manner, with each stage building upon the skills acquired in the previous stage. However, the age range at which children reach each stage can vary widely. Factors such as genetics, environment, and individual differences can influence the rate at which children develop their motor skills.

It is important to note that motor development is a continuum, and children may exhibit a wide range of abilities within a particular age range. Some children may reach certain motor milestones earlier, while others may take longer to develop those skills.

The stages of motor development are typically categorized as follows:

1. Infant Reflexes (0-6 months): In the first few months of life, infants display reflexive movements such as sucking, grasping, and rooting.

2. Fundamental Movement Skills (2-7 years): During this stage, children acquire basic locomotor skills such as walking, running, jumping, and climbing. They also develop object control skills like throwing, catching, and kicking.

3. Skill Development (7-10 years): In this stage, children continue to refine their fundamental movement skills and develop more complex movements. They may engage in activities like riding a bike, skating, and participating in organized sports.

4. Skill Proficiency (11-18 years): During adolescence, children further refine their motor skills and specialize in specific activities or sports. They gain better coordination, balance, and control over their movements.

It is worth mentioning that the age ranges provided for each stage are approximate and serve as a general guideline. Every child develops at their own pace, and there can be significant individual variation.