Thymus is the site for the development and maturation of

$\begin{array}{|p{0.3\linewidth}|p{0.6\linewidth}|} \hline Column\,\,-I & Column\,\,-II \\ \hline a.\,\,Hypertension & 1.\,\,Chest\,\,pain. \\ \hline b.\,\,Atherosclerosis & 2.\,\,Capacity\,\,of\,\,blood\,\,flow\,\,reduced\,\,from\,\,heart\,\,to\,\,body. \\ \hline c.\,\,Angina & 3.\,\,Affect\,\,to\,\,the\,\,organs\,\,like\,\,brain\,\,and\,\,kidney. \\ \hline d.\,\,Heart\,\,failure & 4.\,\,Cholesterol\,\,deposition\,\,in\,\,arteries. \\ \hline \end{array}$

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Choose the wrong statement:
A. Glucocorticoids produce anti-inflammatory reactions and suppress the immune response.
B. PTH also stimulates reabsorption of $Ca ^{2+}$ by the renal tubules and increases $Ca ^{2+}$ absorption from the digested food.
C. Vasopressin increases the loss of water through urine called antidiuretic hormone.
D. Pitocin is known as childbirth as well as milk ejection hormone.

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Which of the following can be taken as characteristic demographic features of the developing countries?

$(a)$ High fertility rate

$(b)$ Rapidly rising mortality rate

$(c)$ Very young age distribution

$(d)$ Rapid population growth

$(e)$ Rapidly falling mortality rate

$(f)$ Very old age distribution

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When the tall plants with red flowers were crossed with dwarf plants having white flowers, Mendel found the ratio of progeny as