Q. Consider the following statements.
1. Non-functioning of lachrymal gland is an important symptom of deficiency of vitamin-A.
2. Deficiency of vitamin-B1 can lead to indigestion and heart enlargement.
3. Vitamin-C deficiency can lead to pain in the muscles.
4. Deficiency of vitamin-D causes increased loss of Ca 2+ in urine.
Which of the statements given above are right?