Suku feels difficulty of vision in dim light.
(a) Identify the disease, from among the following.
(i) Haemophilia
(ii) Night- blindness
(iii) Glaucoma
(b) What is the reason for this 'disease'?

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Solution

(a) Suku is suffering from night-blindness because he is not able to see at night or in poor light.
(b) Night-blindness is caused due to deficiency of vitamin A.

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Q. Vitamin A deficiency leads to night-blindness. Which of the following is the reason for the disease?

Q. What is true for night blindness and haemophilia?

Night blindness is a ____ deficiency disease.

Name the nutrients whose deficiencies cause the following diseases in humans :

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(ii) Pellagra

(iii) Night blindness

(iv) Goitre

(v) Kwashiorkor

The classmates of Bala represented deficiency diseases in a play.
Student 1- Disease caused by vitamin A deficiency.
Student 2- Disease caused by vitamin B₁ deficiency.
Student 3- Symptom of vitamin D deficiency.
Identify the correct match of student and the diseases.

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Suku feels difficulty of vision in dim light. (a) Identify the disease, from among the following.(i) Haemophilia (ii) Night- blindness (iii) Glaucoma(b) What is the reason for this 'disease'?

(a) Suku is suffering from night-blindness because he is not able to see at night or in poor light.(b) Night-blindness is caused due to deficiency of vitamin A.

Suku feels difficulty of vision in dim light.
(a) Identify the disease, from among the following.
(i) Haemophilia
(ii) Night- blindness
(iii) Glaucoma
(b) What is the reason for this 'disease'?

(a) Suku is suffering from night-blindness because he is not able to see at night or in poor light.
(b) Night-blindness is caused due to deficiency of vitamin A.