3236: Which of the following metals is extracted from the Monazite sand found in plenty in India ?
(a) Gold
(b) Uranium
(c) Thorium
(d) Copper
3237: The theory of "Jumping Genes" was propounded by
(a) Gregor Johann Mendel
(b) Thomas Hunt Morgan
(c) Barbara McClintock
(d) Watson and Crick
3238: Consider the following statements:
1. Non-function 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++ in urine.
Which of the statements given above are correct?
(a) 1 and 2
(b) 2, 3 and 4
(c) 1, 3 and 4
(d) 1, 2, 3 and 4
3239: The Supersonic jets tend to cause:
(a) Destruction of ozone layer
(b) Sound pollution
(c) Nervous system breakdown
(d) All of the above
3240: Consider the following diseases :
1. Diphtheria
2. Chickenpox
3. Smallpox
Which of the above diseases has/ havebeen eradicated in India?
(a) 1 and 2 only
(b) 3 only
(c) 1, 2 and 3
(d) None