Assertion (A): The protective membranous covering of the brain and spinal cord are the same, whereas the bony coverings of these are cranium and vertebral column respectively.

Reason (R): Since both are very delicate and sensitive organs of our body, they are protected by a three-layered membrane known as meninges.

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 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): Reflexes are involuntary but all involuntary actions are not reflexes.

Reason (R): Reflexes and involuntary actions of our body are controlled by medulla oblongata and spinal cord respectively.

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.