Appreciation of shape and size of an object placed in hand is lost in damage of-
**Core Concept**
The underlying principle being tested is the concept of **stereognosis**, which refers to the ability to perceive the form and shape of an object by touch. This is a complex sensory function that involves the integration of tactile and proprioceptive information.
**Why the Correct Answer is Right**
The correct answer is related to the **parietal lobe**, specifically the **postcentral gyrus**, which is responsible for processing sensory information from the body, including touch and proprioception. Damage to this area can result in **astereognosis**, a condition where an individual is unable to identify objects by touch.
**Why Each Wrong Option is Incorrect**
**Option A:** This option is incorrect because it is not directly related to the processing of tactile information.
**Option B:** This option is incorrect because it is not specifically involved in the perception of shape and size of objects.
**Option D:** This option is incorrect because it is not directly related to the integration of sensory information.
**Clinical Pearl / High-Yield Fact**
A key point to remember is that **astereognosis** is often associated with damage to the **dominant parietal lobe**, which can result in significant impairment in daily activities.
**Correct Answer:** C. Parietal lobe.