The patient presenting with eye dryness, a gritty sensation, and corneal softening is indicative of a deficiency in a crucial nutrient. Let's analyze these symptoms:
Given these symptoms, the most probable cause is indeed vitamin A deficiency, as it directly affects the health and maintenance of the ocular tissues. Vitamin A plays a vital role in eye health by preserving the mucous membranes and supporting the eye’s moisture and health.
Thus, the patient’s symptoms are consistent with Vitamin A deficiency.
Rajat Singh was working as a supervisor in a stone quarry where rock, sand and gravel are extracted by techniques like digging, drilling, and blasting. As the years rolled by, Rajat started facing a loss in hearing. The high decibel sounds had damaged a part of his internal ear, though the tympanic membrane was intact.
(a) Give the collective term for the structure located in the internal ear.
(b) Name the sensory organ in the Cochlea which was damaged for Rajat Singh.
(c) What kind of pollution do the workers face in the stone quarry?
Tara's grandmother is 70 years old and has a passion for embroidery. She faces difficulty in threading the needle as the eye of the needle appears blurred. The ophthalmologist diagnosed it as an age-related disorder.
(a) Name the eye disorder she is suffering from.
(b) How can the above defect be corrected?
(c) Where is the image formed in the above disorder? 
Karan was standing on a high stool and cleaning the ceiling fan.
He suddenly loses balance and sustains a head injury. An examination reveals that his pupils have lost the capacity to constrict in bright light. Which structure has been damaged?
Bharat woke up late in the morning and missed the school bus.
This situation stimulated the nerves of the sympathetic system which resulted in: 
Copy the diagram given below.
(a) Name the structure.
(b) Label Gray matter and White matter.
Which of the following cranial nerves is responsible for the motor innervation of the muscles of mastication?
The normal pH of arterial blood is:
Which enzyme is deficient in Gaucher’s disease?
The anticoagulant effect of heparin is monitored using:
The causative agent of malaria is: