Assertion (A): The arrangement of white and gray matter is the same in both brain and spinal cord.

Reason (R): Gray matter consists of cell bodies of the neuron, whereas white matter contains the axons of the nerve cells. One region is termed as the cortex and the other is medulla.

1. Both A and R are True
2. Both A and R are False
3. A is True and R is False.
4. A is False and R is True.

Assertion (A): The sympathetic nervous system is stimulated by the hormone thyroxine which is secreted by the thyroid gland.

Reason (R): Sympathetic nervous system prepares the body for violent action against abnormal conditions. Adrenaline is termed as emergency hormone.

1. Both A and R are True
2. Both A and R are False
3. A is True and R is False.
4. A is False and R is True.

Assertion (A): Lacrimal gland is a kind of endocrine gland which secretes an enzyme called thrombokinase.

Reason (R): Lacrimal gland is located in the upper outer portion of the orbit of the eye. Tears act as a lubricant and also have antiseptic property.

1. Both A and R are True
2. Both A and R are False
3. A is True and R is False.
4. A is False and R is True.

Assertion (A): Choroid layer provides nourishment to the eye and also prevents light rays form reflecting and scattering inside the eye.

Reason (R): Choroid layer is the outermost layer of the eyeball which surrounds the sclerotic layer. This layer contains two types of pigments-Rhodopsin and Iodopsin.

1. Both A and R are True
2. Both A and R are False
3. A is True and R is False.
4. A is False and R is True.